diff --git a/README.md b/README.md
index 65960e0..2987754 100644
--- a/README.md
+++ b/README.md
@@ -67,4 +67,8 @@ Below is the list of items included in the code dictionary, and their correspond
 * Oxygen (O)
 * Neon (Ne)
 * Silicon (Si)
-* Iron (Fe)
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+* Iron (Fe)
+
+# Reference
+
+To cite the material in this repository, you can simply use the widget in the about section. It will generate a citation automatically.
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