BOLOGNA, G. (1978). Simon & Schuster's Guide To Birds Of The World By Gianfranco Bologna; Edited By John Bull. Simon & Schuster.
Chicago-referens (17:e uppl.)BOLOGNA, Gianfranco. Simon & Schuster's Guide To Birds Of The World By Gianfranco Bologna; Edited By John Bull. Simon & Schuster, 1978.
MLA-referens (8:e uppl.)BOLOGNA, Gianfranco. Simon & Schuster's Guide To Birds Of The World By Gianfranco Bologna; Edited By John Bull. Simon & Schuster, 1978.
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