APA (7th ed.) Citation

Munroe, R. (2014). What if?: Serious scientific answers to absurd hypothetical questions (First edition.). John Murray.

Chicago Style (17th ed.) Citation

Munroe, Randall. What If?: Serious Scientific Answers to Absurd Hypothetical Questions. First edition. Great Britain: John Murray, 2014.

MLA (9th ed.) Citation

Munroe, Randall. What If?: Serious Scientific Answers to Absurd Hypothetical Questions. First edition. John Murray, 2014.