diff --git a/rails/pretend-generations.md b/rails/pretend-generations.md
index 5333b4b..084bf7e 100644
--- a/rails/pretend-generations.md
+++ b/rails/pretend-generations.md
@@ -22,3 +22,5 @@ then you will see the following output
 
 though those files will not have actually been created. You now know
 precisely what rails will generate for you.
+
+[source](http://rubyquicktips.com/post/19223887750/pretend-to-generate)