Dyfyniad APA

Guinness World Records Limited., & Glenday, C. (2009). Guinness world records 2010. [London]: Guinness World Records.

Dyfyniad Arddull Chicago

Guinness World Records Limited., and Craig Glenday. Guinness World Records 2010. [London]: Guinness World Records, 2009.

Dyfyniad MLA

Guinness World Records Limited., and Craig Glenday. Guinness World Records 2010. [London]: Guinness World Records, 2009.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.