Mendeloff, John M.
The MIT Pres, 1988
Buku Teks
Hood, Jack B.
West Publishing, 1990
Buku Teks
Ross, Martin J., author
A Fawcett Crest Book, 1967
Buku Teks
Holub, Steven F.,
An Aspen Publication., 1983
Buku Teks
Nolan, Dennis R.
West Publishing Company, 1979
Buku Teks