Postlethwait, John H.
Brooks/Cole, Thomson Learning, 2003
Buku Teks
Darwin, Charles
Ikon Teralitera, 2002
Buku Teks
Mayr, Ernst
Harvard University Press, 1999
Buku Teks
Darwin, Charles
Penguin Books, 1985
Buku Teks
Darwin, Charles
The Modern Library , [date of publication not identified]
Buku Teks