Dyfyniad APA

Norris & Ross. (1974). Guinness book of records (21st.). Guiness Superlatives.

Dyfyniad Arddull Chicago

Norris and Ross. Guinness Book of Records. 21st. Middlesex: Guiness Superlatives, 1974.

Dyfyniad MLA

Norris and Ross. Guinness Book of Records. 21st. Guiness Superlatives, 1974.

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