APA (7th ed.) Citation

(1997). The guinness book of the 20th century. Guinness.

Chicago Style (17th ed.) Citation

The Guinness Book of the 20th Century. London: Guinness, 1997.

MLA (9th ed.) Citation

The Guinness Book of the 20th Century. Guinness, 1997.

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