APA (7th ed.) Citation

(2008). Guinness world records 2009. Guinness world records Ltd.

Chicago Style (17th ed.) Citation

Guinness World Records 2009. Guinness world records Ltd, 2008.

MLA (9th ed.) Citation

Guinness World Records 2009. Guinness world records Ltd, 2008.

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