diff --git a/tutorial_files/part3.textile b/tutorial_files/part3.textile
index 68778d4..093ee7b 100644
--- a/tutorial_files/part3.textile
+++ b/tutorial_files/part3.textile
@@ -223,6 +223,7 @@ http://www.sqlite.org/lang_keywords.html
 http://www.sqlite.org/lang_expr.html
 http://www.sqlite.org/foreignkeys.html
 http://en.wikipedia.org/wiki/SQL
+https://hackr.io/tutorials/learn-sql
 
 
 <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/"><img alt="Creative Commons License" style="border-width:0" src="http://i.creativecommons.org/l/by-nc-nd/3.0/88x31.png" /></a><br /><span xmlns:dct="http://purl.org/dc/terms/" href="http://purl.org/dc/dcmitype/Text" property="dct:title" rel="dct:type">A Gentle Introduction to SQL Using SQLite</span> by <a xmlns:cc="http://creativecommons.org/ns#" href="https://github.com/tthibo/SQL-Tutorial" property="cc:attributionName" rel="cc:attributionURL">Troy Thibodeaux</a> is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/3.0/">Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License</a>.