Krebs, Charles J., author
Harper Collins, 1989
Buku Teks
Allen, T.F.H., author
University of Chicago Press, 1988
Buku Teks
editod by L. Elliot Shubert
Acedemic Press, 1994
Buku Teks
Australian Government Publishing Service, 1976
Buku Teks
Allee, W.C., author
John Wiley & Sons, 1963
Buku Teks