APA (7th ed.) Citation

Siegel, A. M., & Etzkorn, I. (2013). Simple: Conquering the crisis of complexity. Twelve.

Chicago Style (17th ed.) Citation

Siegel, Alan M., and Irene Etzkorn. Simple: Conquering the Crisis of Complexity. New York: Twelve, 2013.

MLA (9th ed.) Citation

Siegel, Alan M., and Irene Etzkorn. Simple: Conquering the Crisis of Complexity. Twelve, 2013.