Dyfyniad APA

Collins Cobuild. (1989). English learner's dictionary. London: Collins publishers.

Dyfyniad Arddull Chicago

Collins Cobuild. English Learner's Dictionary. London: Collins publishers, 1989.

Dyfyniad MLA

Collins Cobuild. English Learner's Dictionary. London: Collins publishers, 1989.

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