Jurgensen, Ray C., author
Houghton-Miffiln, 1983
Buku Teks
Audubon, John James, author
Macmillan, 1985
Buku Referensi
Mason, Victor
Periplus Editions, 1989
Buku Referensi
Wright, Judith, 1915-2000, author
Angus and Robertson, 1962
Koleksi Publik
edited by Christopher M. Perrins, Alex L.A. Middleton
Facts on File, 1985
Buku Referensi