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
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
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Audubon, John James
The birds of America
Macmillan, 1985
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The encyclopaedia of birds
edited by Christopher M. Perrins and Alex L.A. Middleton
Grolier International, 1993
 Buku Referensi