APA (7th ed.) Citation

Enns, R. H. (2011). It's a Nonlinear World (1.). Springer New York.

Chicago Style (17th ed.) Citation

Enns, Richard H. It's a Nonlinear World. 1. New York, NY: Springer New York, 2011.

MLA (8th ed.) Citation

Enns, Richard H. It's a Nonlinear World. 1. Springer New York, 2011.