Wendt, Paul Francis, author
McGraw-Hill, 1979
Buku Teks
Jaffe, Austin J., author
Prentice-Hall, 1982
Buku Teks
American Bar Association, 1974
Buku Teks
Brown, Gerald R. (Gerald Roderick), 1944-, author
Financial Times, Prentice Hall, 1987
Buku Teks
Wiedemer, John P., 1918-
Reston Pub. Co, 1985
Buku Teks