Mayr, Ernst, author
Belknap Press, 1963
Buku Teks
edited by Peter Moore, R.J. Berry and A. Hallam
Grolier International, 1993
Buku Referensi
McFarland, David, author
Longman, 1993
Buku Teks
Tullar, Richard M., author
McGraw-Hill, 1977
Buku Teks
Facts on file, 1989
Buku Teks