diff --git a/Persian.js/README.md b/Persian.js/README.md
index f66ecd6..5c91ed2 100644
--- a/Persian.js/README.md
+++ b/Persian.js/README.md
@@ -1,3 +1,5 @@
+source: [PersianJS](https://github.com/usablica/persian.js)
+
 ## Persian.js
 A simple JavaScript library for Persian language localization.