Handbook of Australian, New Zealand & Antarctic birds : volume 2, raptors to lapwings
edited by S. Marchant, P.J. Higgins
Oxford University Press, 1993
 Buku Referensi
Hormones and reproduction of vertebrates; Volume 4 : Birds
edited by David O. Norris, Kristin H. Lopez
Elsevier, 2011
 Buku Referensi
Western Europe: a handbook
edited by John Calmann
Frederick A. Praeger, 1967
 Buku Teks SO
Peterson, Roger Tory
A field guide to the birds : a completely new guide to all the birds of eastern and central North America
Houghton Miffiln, 1980
 Buku Referensi
Audubon, John James
The birds of America
Macmillan, 1985
 Buku Referensi