From 4573e0071232eb5be748c3eef1d4e27cca072ae5 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Sun, 3 Apr 2016 10:08:54 -0700
Subject: [PATCH] Update README

---
 part13/README.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/part13/README.md b/part13/README.md
index 3a709ab..91b1c38 100644
--- a/part13/README.md
+++ b/part13/README.md
@@ -21,3 +21,7 @@ elm live Main.elm --open -- --output=elm.js
 ```bash
 elm css Stylesheets.elm
 ```
+
+## References
+
+* [Elm CSS documentation](http://package.elm-lang.org/packages/rtfeldman/elm-css/1.1.0/)