Dyfyniad APA

Irwin,Christopher. (2000). Guinness world records 2001. Guinnes world research records Ltd.

Dyfyniad Arddull Chicago

Irwin,Christopher. Guinness World Records 2001. London: Guinnes world research records Ltd, 2000.

Dyfyniad MLA

Irwin,Christopher. Guinness World Records 2001. Guinnes world research records Ltd, 2000.

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