Bullard, Fred M
University of Queenland Press, 1977
Buku Teks
Prager, Ellen J.
McGraw-Hill, 2000
Buku Teks
Sutherland, Lin
University of New South Wales Press, 1995
Buku Referensi
introduction by Bruce A. Bolt
W.H. Freeman, 1980
Buku Teks
Portmann, Adolf
Columbia University Press, 1990
Buku Teks