Head & Shoulders Clinical Strength Shampoo. Procter & Gamble. Accessed May 28, 2015 from http://www.headandshoulders.com/en-US/hair-products/medicated-shampoo
Selsun Blue. Chattem. Accessed May 28, 2015 from http://www.selsunblue.com/max-strength/
Selenium Sulfide. Micromedex System. Truven Health Analytics. Accessed 5/29/15 from http://www.thomsonhc.com/micromedex2/