edited by Stanley Cramp, C.M. Perrins
Oxford University Press, 1993
Buku Referensi
edited by S. Marchant, P.J. Higgins
Oxford University Press, 1993
Buku Referensi
edited by David O. Norris, Kristin H. Lopez
Elsevier, 2011
Buku Referensi
Peterson, Roger Tory, author
Houghton Miffiln, 1980
Buku Referensi
Audubon, John James, author
Macmillan, 1985
Buku Referensi