diff --git a/Doc/documenting/style.rst b/Doc/documenting/style.rst
index 593f6da..6145559 100644
--- a/Doc/documenting/style.rst
+++ b/Doc/documenting/style.rst
@@ -66,5 +66,5 @@
     1970s.
 
 
-.. _Apple Publications Style Guide: http://developer.apple.com/documentation/UserExperience/Conceptual/APStyleGuide/APSG_2008.pdf
+.. _Apple Publications Style Guide: http://developer.apple.com/mac/library/documentation/UserExperience/Conceptual/APStyleGuide/APSG_2009.pdf