APA (7th ed.) Citation

(2017). O's little guide to the big questions. Macmillan.

Chicago Style (17th ed.) Citation

O's Little Guide to the Big Questions. London: Macmillan, 2017.

MLA (9th ed.) Citation

O's Little Guide to the Big Questions. Macmillan, 2017.

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