Dyfyniad APA

Alderton, D. (2014). The World Encyclopedia of Birds. Hermes House.

Dyfyniad Arddull Chicago

Alderton, David. The World Encyclopedia of Birds. London: Hermes House, 2014.

Dyfyniad MLA

Alderton, David. The World Encyclopedia of Birds. Hermes House, 2014.

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