"Federal legislation makes airbags mandatory." History.com. A&E Television Networks, n.d. Web. 15 Jan. 2017.

"Federal Motor Vehicle Safety Standards and Regulations." Federal Motor Vehicle Safety Standards and Regulations. N.p., n.d. Web. 16 Jan. 2017.

Plourde, K. Exploring Creation with Chemistry. 3rd ed. Anderson, IN: Apologia Educational Ministries, Inc., 2014. Print.