diff --git a/objective-c.html.markdown b/objective-c.html.markdown
index 91b84b47..407ba3c8 100644
--- a/objective-c.html.markdown
+++ b/objective-c.html.markdown
@@ -5,6 +5,7 @@ contributors:
     - ["Eugene Yagrushkin", "www.about.me/yagrushkin"]
     - ["Yannick Loriot", "https://github.com/YannickL"]
     - ["Levi Bostian", "https://github.com/levibostian"]
+    - ["Clayton Walker", "https://github.com/cwalk"]
 filename: LearnObjectiveC.m
 
 ---
@@ -747,4 +748,8 @@ __unsafe_unretained NSArray *unsafeArray; // Like __weak, but unsafeArray not se
 
 [Programming with Objective-C. Apple PDF book](https://developer.apple.com/library/ios/documentation/cocoa/conceptual/ProgrammingWithObjectiveC/ProgrammingWithObjectiveC.pdf)
 
+[Programming with Objective-C for iOS](https://developer.apple.com/library/ios/documentation/General/Conceptual/DevPedia-CocoaCore/ObjectiveC.html)
+
+[Programming with Objective-C for Mac OSX](https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/Introduction/Introduction.html)
+
 [iOS For High School Students: Getting Started](http://www.raywenderlich.com/5600/ios-for-high-school-students-getting-started)