diff --git a/guide/english/design-patterns/object-oriented-programming/index.md b/guide/english/design-patterns/object-oriented-programming/index.md
index 90dda1cfd0..b5200e7030 100644
--- a/guide/english/design-patterns/object-oriented-programming/index.md
+++ b/guide/english/design-patterns/object-oriented-programming/index.md
@@ -35,3 +35,5 @@ See the image below. It represents a blueprint of a class named car. An instance
 
 ## What next?
 Pick an OO language, and build a basic terminal based game to illustrate these concepts.
+
+Suggested Read - https://sourcemaking.com/design-patterns-and-tips