APA (7th ed.) Citation

Guinness World Records Limited & Glenday, C. (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. New York: Guinness World Records Limited, 2017.

MLA (8th 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.