Glasby, John S., author
Ellis Horwood, 1992
Buku Referensi
by Edward O. Wilson... (et al.)
Sinaur Associates, 1977
Buku Teks
edited by A.P.M. Lockwood
Cambridge University Press, 1976
Buku Teks
Labeda, David P., author
McGraw-Hill , 1990
Buku Teks
London: Tiger Books International, 1994,
Buku Referensi