diff --git a/core-java-modules/core-java-collections-list-4/README.md b/core-java-modules/core-java-collections-list-4/README.md
index 83c5163ae2..5b16b360c9 100644
--- a/core-java-modules/core-java-collections-list-4/README.md
+++ b/core-java-modules/core-java-collections-list-4/README.md
@@ -10,4 +10,5 @@ This module contains articles about the Java List collection
 - [Replace Element at a Specific Index in a Java ArrayList](https://www.baeldung.com/java-arraylist-replace-at-index)
 - [Difference Between Arrays.asList() and List.of()](https://www.baeldung.com/java-arrays-aslist-vs-list-of)
 - [How to Store HashMap<String, ArrayList> Inside a List](https://www.baeldung.com/java-hashmap-inside-list)
+- [Convert a List to a Comma-Separated String](https://www.baeldung.com/java-list-comma-separated-string)
 - [[<-- Prev]](/core-java-modules/core-java-collections-list-3)