Holt, Jack A., author
Irwin, 1990
Buku Teks
Holt, Jack A., author
Richard D. Irwin , 1990
Buku Teks
McClure, Rhyder, author
Brady, 1990
Buku Teks
Brigham, Eugene F., 1930-, author
Dryden Press, 1988
Buku Teks
McClure, Rhyder, author
Brady, 1989
Buku Teks