APA (7th ed.) Citation

Guinness World Records Limited & Glenday, C. (2008). Guinness world records 2009. Guinness World Records.

Chicago Style (17th ed.) Citation

Guinness World Records Limited and Craig Glenday. Guinness World Records 2009. [New York]: Guinness World Records, 2008.

MLA (8th ed.) Citation

Guinness World Records Limited and Craig Glenday. Guinness World Records 2009. Guinness World Records, 2008.

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