APA (7th ed.) Citation

Guinness. (1991). The Guinness book of answers. Guinness.

Chicago Style (17th ed.) Citation

Guinness. The Guinness Book of Answers. Enfield: Guinness, 1991.

MLA (9th ed.) Citation

Guinness. The Guinness Book of Answers. Guinness, 1991.

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