diff --git a/README.md b/README.md
index 6d94db2..4b1d732 100644
--- a/README.md
+++ b/README.md
@@ -51,3 +51,7 @@ I know right?
 ## Contributing
 
 You don't.
+
+## Reference
+
+https://github.com/binhnguyennus/awesome-scalability