Cita APA (7th ed.)

Munroe,Randall. (2014). What If?: Serious Scientific Answers to Absurd Hypothetical Questions (NA.). Houghton Mifflin Harcourt.

Cita Chicago (17th ed.)

Munroe,Randall. What If?: Serious Scientific Answers to Absurd Hypothetical Questions. NA. Boston: Houghton Mifflin Harcourt, 2014.

Cita MLA (9th ed.)

Munroe,Randall. What If?: Serious Scientific Answers to Absurd Hypothetical Questions. NA. Houghton Mifflin Harcourt, 2014.