diff --git a/Sorting/BitonicSort.cpp b/Sorting/BitonicSort.cpp
index 24c0639d9..e03e4fc14 100644
--- a/Sorting/BitonicSort.cpp
+++ b/Sorting/BitonicSort.cpp
@@ -1,3 +1,4 @@
+// Source : https://www.geeksforgeeks.org/bitonic-sort/
 
 /* C++ Program for Bitonic Sort. Note that this program 
    works only when size of input is a power of 2. */