APA (7th ed.) Citation

Wells, W. (2009). Apocalypse When?: Calculating How Long the Human Race Will Survive. Praxis.

Chicago Style (17th ed.) Citation

Wells, Willard. Apocalypse When?: Calculating How Long the Human Race Will Survive. New York, NY: Praxis, 2009.

MLA (8th ed.) Citation

Wells, Willard. Apocalypse When?: Calculating How Long the Human Race Will Survive. Praxis, 2009.

Warning: These citations may not always be 100% accurate.