Munroe,Randall. (2014). What If?: Serious Scientific Answers to Absurd Hypothetical Questions (NA.). Houghton Mifflin Harcourt.
Lua i Stíl Chicago (17ú heag.)Munroe,Randall. What If?: Serious Scientific Answers to Absurd Hypothetical Questions. NA. Boston: Houghton Mifflin Harcourt, 2014.
Lua MLA (9ú heag.)Munroe,Randall. What If?: Serious Scientific Answers to Absurd Hypothetical Questions. NA. Houghton Mifflin Harcourt, 2014.
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