APA (7th ed.) Citation

Guinness World Records Limited & Craig Glenday. (2017). Guinness world records 2018. Guinness World Records Limited.

Chicago Style (17th ed.) Citation

Guinness World Records Limited and Craig Glenday. Guinness World Records 2018. London, England: Guinness World Records Limited, 2017.

MLA (9th ed.) Citation

Guinness World Records Limited and Craig Glenday. Guinness World Records 2018. Guinness World Records Limited, 2017.

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