Williamson, John
Basic Books, Inc., 1983
Buku Teks
Williamson, John
New York University Press, 1991
Buku Teks
Williamson, John
Harvester Wheatsheaf, 1991
Buku Teks
Adams, John, 1938-, author
St. Martin's Press, 1985
Buku Teks
Rosser, J. Barkley, author
McGraw-Hill, 1996
Buku Teks