Dyfyniad APA

Speer Glenn M., Grumet Tobey, Hadad Herbert, Kamisar Stacy, Stiewe David J., & Young, K. R. (1997). The guinness book of world records 1998. Guinness Media.

Dyfyniad Arddull Chicago

Speer Glenn M., Grumet Tobey, Hadad Herbert, Kamisar Stacy, Stiewe David J., and Karen Romano Young. The Guinness Book of World Records 1998. Stamford: Guinness Media, 1997.

Dyfyniad MLA

Speer Glenn M., et al. The Guinness Book of World Records 1998. Guinness Media, 1997.

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