diff --git a/app/controllers/ingredients_controller.rb b/app/controllers/ingredients_controller.rb
index 10cdc24..0dde53d 100644
--- a/app/controllers/ingredients_controller.rb
+++ b/app/controllers/ingredients_controller.rb
@@ -6,14 +6,15 @@ class IngredientsController < ApplicationController
   before_action :authorize
 
   def index
-    @ingredient = Ingredient.new(project: @project)
+    @ingredient = @project.ingredients.new
     # passing attr for after_initialize
     @ingredient.nutrients.new(ingredient: @ingredient)
     @ingredients = @project.ingredients.includes(:ref_unit)
+    @ingredients << @ingredient
   end
 
   def create
-    @ingredient = Ingredient.new(ingredient_params.update(project: @project))
+    @ingredient = @project.ingredients.new(ingredient_params)
     if @ingredient.save
       flash[:notice] = 'Created new ingredient'
       redirect_to project_ingredients_url(@project)
diff --git a/app/controllers/quantities_controller.rb b/app/controllers/quantities_controller.rb
index 65e15bf..1136c76 100644
--- a/app/controllers/quantities_controller.rb
+++ b/app/controllers/quantities_controller.rb
@@ -4,12 +4,12 @@ class QuantitiesController < ApplicationController
   before_action :authorize
 
   def index
-    @quantity = Quantity.new
+    @quantity = @project.quantities.new
     @quantities = @project.quantities
   end
 
   def create
-    @quantity = Quantity.new(quantity_params.update(project: @project))
+    @quantity = @project.quantities.new(quantity_params)
     if @quantity.save
       flash[:notice] = 'Created new quantity'
       redirect_to project_quantities_url(@project)
diff --git a/app/controllers/sources_controller.rb b/app/controllers/sources_controller.rb
index f3bfb46..4ac2739 100644
--- a/app/controllers/sources_controller.rb
+++ b/app/controllers/sources_controller.rb
@@ -1,6 +1,11 @@
 class SourcesController < ApplicationController
+  before_action :find_project_by_project_id, only: [:index, :create]
+  before_action :find_source, only: [:destroy]
+  before_action :authorize
 
   def index
+    @source = @project.sources.new
+    @sources = @project.sources
   end
 
   def create
diff --git a/app/controllers/units_controller.rb b/app/controllers/units_controller.rb
index 2fcc0e9..31d3b32 100644
--- a/app/controllers/units_controller.rb
+++ b/app/controllers/units_controller.rb
@@ -4,12 +4,12 @@ class UnitsController < ApplicationController
   before_action :authorize
 
   def index
-    @unit = Unit.new
+    @unit = @project.units.new
     @units = @project.units
   end
 
   def create
-    @unit = Unit.new(unit_params.update(project: @project))
+    @unit = @project.units.new(unit_params)
     if @unit.save
       flash[:notice] = 'Created new unit'
       redirect_to project_units_url(@project)
diff --git a/app/views/body_trackers/_sidebar.html.erb b/app/views/body_trackers/_sidebar.html.erb
index 9f50063..c81995b 100644
--- a/app/views/body_trackers/_sidebar.html.erb
+++ b/app/views/body_trackers/_sidebar.html.erb
@@ -10,6 +10,7 @@
 
 <h3><%= t ".heading_common" %></h3>
 <ul>
+  <li><%= link_to t(".link_sources"), project_sources_path(@project) %></li>
   <li><%= link_to t(".link_quantities"), project_quantities_path(@project) %></li>
   <li><%= link_to t(".link_units"), project_units_path(@project) %></li>
   <% if User.current.allowed_to?(:manage_common, @project) %>
diff --git a/app/views/ingredients/_form.html.erb b/app/views/ingredients/_form.html.erb
index ff61dd3..b5624ff 100644
--- a/app/views/ingredients/_form.html.erb
+++ b/app/views/ingredients/_form.html.erb
@@ -3,7 +3,7 @@
 <div class="box tabular">
   <p><%= f.text_field :name, size: 40, required: true %></p>
   <p>
-  <%= f.number_field :ref_amount, size: 8, required: true, min: 0 %>
+  <%= f.number_field :ref_amount, size: 8, required: true, min: 0, label: :field_reference %>
   <%= f.select :ref_unit_id, unit_options, {label: '', required: true} %>
   </p>
   <p><%= f.select :group, group_options, required: true %></p>
diff --git a/app/views/ingredients/index.html.erb b/app/views/ingredients/index.html.erb
index dfd29a9..1a966da 100644
--- a/app/views/ingredients/index.html.erb
+++ b/app/views/ingredients/index.html.erb
@@ -46,7 +46,7 @@
 </div>
 
 <h2><%= t ".heading" %></h2>
-<% if @ingredients.any? %>
+<% if @ingredients.many? %>
   <table class="list">
     <thead>
       <tr>
@@ -59,6 +59,7 @@
     </thead>
     <tbody>
       <% @ingredients.each do |i| %>
+        <% next if i.new_record? %>
         <tr id="ingredient-<%= i.id %>" class="ingredient <%= 'hidden' if i.hidden %>">
           <td class="name"><%= i.name %></td>
           <td class="reference"><%= i.ref_amount %> [<%= i.ref_unit.shortname %>]</td>
diff --git a/app/views/quantities/index.html.erb b/app/views/quantities/index.html.erb
index a330a2e..f56f508 100644
--- a/app/views/quantities/index.html.erb
+++ b/app/views/quantities/index.html.erb
@@ -23,7 +23,7 @@
 </div>
 
 <h2><%= t ".heading" %></h2>
-<% if @quantities.any? %>
+<% if @quantities.many? %>
   <table class="list">
     <thead>
       <tr>
@@ -35,6 +35,7 @@
     </thead>
     <tbody>
         <% Quantity.each_with_level(@quantities) do |q, level| %>
+          <% next if q.new_record? %>
           <tr id="quantity-<%= q.id %>"
               class="quantity <%= "project idnt idnt-#{level}" if level > 0 %>">
             <td class="name"><span><%= q.name %></span></td>
diff --git a/app/views/units/index.html.erb b/app/views/units/index.html.erb
index 01c25b5..f8d7aa2 100644
--- a/app/views/units/index.html.erb
+++ b/app/views/units/index.html.erb
@@ -23,7 +23,7 @@
 </div>
 
 <h2><%= t ".heading" %></h2>
-<% if @units.any? %>
+<% if @units.many? %>
   <table class="list">
     <thead>
       <tr>
@@ -34,6 +34,7 @@
     </thead>
     <tbody>
       <% @units.each do |u| %>
+        <% next if u.new_record? %>
         <tr id="unit-<%= u.id %>" class="unit">
           <td class="shortname"><%= u.shortname %></td>
           <td class="unitname"><%= u.name %></td>
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 8b20f37..c167a66 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -29,6 +29,7 @@ en:
       heading_common: 'Common'
       link_summary: 'Summary'
       link_ingredients: 'Ingredients'
+      link_sources: 'Data sources'
       link_quantities: 'Quantities'
       link_units: 'Units'
       link_defaults: 'Load defaults'