diff --git a/README.md b/README.md
index f928617..955fd07 100644
--- a/README.md
+++ b/README.md
@@ -8,3 +8,4 @@ a PE loader for educational purposes.
 - https://learn.microsoft.com/en-us/archive/msdn-magazine/2002/february/inside-windows-win32-portable-executable-file-format-in-detail
 - https://learn.microsoft.com/en-us/archive/msdn-magazine/2002/march/inside-windows-an-in-depth-look-into-the-win32-portable-executable-file-format-part-2
 - https://learn.microsoft.com/en-us/windows/win32/dlls/dynamic-link-library-search-order
+- https://www.geoffchappell.com/studies/windows/win32/apisetschema/index.htm?tx=1