APA (7th ed.) Citation

(1997). Guinness Book Of The 20th Century. Guinness Publishing Ltd..

Chicago Style (17th ed.) Citation

Guinness Book Of The 20th Century. s.n.: Guinness Publishing Ltd., 1997.

MLA (9th ed.) Citation

Guinness Book Of The 20th Century. Guinness Publishing Ltd., 1997.

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