diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
 hascheme
 ========
 
-The scheme in Haskell tutorial, redone with more Haskell experience
+The scheme in [Haskell tutorial](http://en.wikibooks.org/wiki/Write_Yourself_a_Scheme_in_48_Hours), redone with more Haskell experience