Dyfyniad APA

BOLOGNA, G. (1978). Simon & Schuster's Guide To Birds Of The World By Gianfranco Bologna; Edited By John Bull. Simon & Schuster.

Dyfyniad Arddull Chicago

BOLOGNA, Gianfranco. Simon & Schuster's Guide To Birds Of The World By Gianfranco Bologna; Edited By John Bull. Simon & Schuster, 1978.

Dyfyniad MLA

BOLOGNA, Gianfranco. Simon & Schuster's Guide To Birds Of The World By Gianfranco Bologna; Edited By John Bull. Simon & Schuster, 1978.

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