Sharp, David, author
Bay Books, 1984
Buku Referensi
edited by Crickette M. Sanz, Josep Call, Christophe Boesch
Cambridge University Press, 2014
Buku Teks
Cornwell, Alan, author
McGraw-Hill, 1974
Buku Teks
Kendeigh, S. Charles
Prentice-Hall, 1975
Buku Teks
Linton, Alan H., author
John Wiley & Sons, 1982
Buku Teks