(n.d.). Retrieved from General Motors: http://www.gm.com/company/aboutGM/gm_sustainability.html
About GM: Our Company. (n.d.). Retrieved from General Motors: http://www.gm.com/company/aboutGM/our_company.html
Cohan, P. (2009, May 31). After 101 years, why GM failed. Retrieved from daily finance: http://www.dailyfinance.com/2009/05/31/after-101-years-why-gm-failed/
Innovation: Community & Education. (n.d.). Retrieved from General Motors: http://www.gm.com/vision/community_education/corporate_citizenship.html
More, R. (2009, June). HOW GENERAL MOTORS LOST ITS FOCUS – AND ITS WAY. Retrieved from Ivey business journal: http://iveybusinessjournal.com/publication/how-general-motors-lost-its-focus-and-its-way/
Kallstrom, H. (2015, February 15). Welcome to Market Realist. Retrieved December 13, 2015, from http://marketrealist.com/2015/02/suppliers-power-increasing-automobile-industry/
Porter's Five Forces: Assessing the Balance of Power in a Business Situation. (n.d.). Retrieved December 13, 2015, from https://www.mindtools.com/pages/article/newTMC_08.htm
Samuelson, W., & Marks, S. (2012). Managerial economics (7th ed.). Hoboken, N.J.: