Dyfyniad APA

Brusewitz, R. V. i. b. G. In search of artic birds. T and AD Poyser.

Dyfyniad Arddull Chicago

Brusewitz, Richard Vaughan illustrated by Gunnar. In Search of Artic Birds. T and AD Poyser.

Dyfyniad MLA

Brusewitz, Richard Vaughan illustrated by Gunnar. In Search of Artic Birds. T and AD Poyser.

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