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
Audubon, John James
The birds of America
Macmillan, 1985
 Buku Referensi
The encyclopaedia of birds
edited by Christopher M. Perrins and Alex L.A. Middleton
Grolier International, 1993
 Buku Referensi
A Dictionary of birds
edited by Bruce Campbell and Elizabeth Lack
Buteo Books, 1985
 Buku Referensi