diff --git a/docs/content/guide/external-resources.ngdoc b/docs/content/guide/external-resources.ngdoc
index 1191a09da3f2..1c80babf220f 100644
--- a/docs/content/guide/external-resources.ngdoc
+++ b/docs/content/guide/external-resources.ngdoc
@@ -143,4 +143,6 @@ You can find a larger list of Angular external libraries at [ngmodules.org](http
   [WintellectNOW (4 lessons)](http://www.wintellectnow.com/Course/Detail/mastering-angularjs)
 * **Paid onsite:**
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+  [AngularJS: Maintaining Web Applications](https://www.packtpub.com/web-development/angularjs-maintaining-web-applications) by Packt
+