APA (7th ed.) Citation

(1991). The guiness book of answers. Guiness Publishing.

Chicago Style (17th ed.) Citation

The Guiness Book of Answers. Great Britian: Guiness Publishing, 1991.

MLA (8th ed.) Citation

The Guiness Book of Answers. Guiness Publishing, 1991.

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