diff --git a/source/part-9-bonus/00-main.adoc b/source/part-9-bonus/00-main.adoc
index d645a2f..f789006 100644
--- a/source/part-9-bonus/00-main.adoc
+++ b/source/part-9-bonus/00-main.adoc
@@ -1,5 +1,7 @@
 = En Bonus
 
+https://gto76.github.io/python-cheatsheet/[Python Cheat Sheet]
+
 include::code-snippets.adoc[]
 
 include::legacy.adoc[]