diff --git a/patterns-modules/design-patterns-singleton/README.md b/patterns-modules/design-patterns-singleton/README.md
index edec116b93..a4915ebfaf 100644
--- a/patterns-modules/design-patterns-singleton/README.md
+++ b/patterns-modules/design-patterns-singleton/README.md
@@ -1,2 +1,3 @@
 ### Relevant Articles:
 - [How to Serialize a Singleton in Java](https://www.baeldung.com/java-serialize-singleton)
+- [Bill Pugh Singleton Implementation](https://www.baeldung.com/java-bill-pugh-singleton-implementation)