Bolman, Lee G. & Deal, Terrence E. (2003). Reframing Organizations: Artistry, Choice, and Leadership. John Wiley and Sons.
Carpenter, Mason, Bauer, Talya, & Erdogan. (2010). Principles of Management V1.1. Flat World Knowledge Inc.
CogMap. (2011). Zappos.com. Chart Data. Web. http://www.cogmap.com/chart/zappos.com
Palmeri, Christopher. (2009). Zappos retails its culture: The online shoe seller is marketing its playful, customer-friendly model to other businesses. BusinessWeek. Web. http://www.businessweek.com/magazine/content/10_02/b4162057120453.htm?chan=innovation_branding_brand+profiles