Radford, Albert E., author
Harper and Row, 1986
Buku Teks
Wiley, E.O., author
John Wiley & Sons, 1981
Buku Teks
edited by David J. Galloway
Clarendon Press, 1991
Buku Teks
editor, D.A. Murray
Pergamon Press, 1980
Buku Teks
Crawford, Daniel J., author
John Wiley & Sons, 1990
Buku Teks