diff --git a/README.md b/README.md
index a1cd3bd..f6346c5 100644
--- a/README.md
+++ b/README.md
@@ -3,4 +3,5 @@ biometric rest backend in C#
 
 
 # References
+- https://learn.microsoft.com/en-us/aspnet/core/tutorials/first-web-api?view=aspnetcore-8.0&tabs=visual-studio
 - Pro C# by Troelsen https://www.amazon.ca/Pro-Net-Foundational-Principles-Programming/dp/1484278682