BOLOGNA, G. (1978). Simon & Schuster's Guide To Birds Of The World By Gianfranco Bologna; Edited By John Bull. Simon & Schuster.
Chicago Style aipamenaBOLOGNA, Gianfranco. Simon & Schuster's Guide To Birds Of The World By Gianfranco Bologna; Edited By John Bull. Simon & Schuster, 1978.
MLA aipamenaBOLOGNA, Gianfranco. Simon & Schuster's Guide To Birds Of The World By Gianfranco Bologna; Edited By John Bull. Simon & Schuster, 1978.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.