Kesselman, Mark
D.C. Health an Company, 1987
Buku Teks
McCormick, John, 1954-
Thomson Wadsworth, 2004
Buku Teks
Abdul Razak Baginda
Asean Academic Press, 2003
Buku Teks
McCormick, John, 1954-
Wadsworth, 2010
Buku Teks SO
edited by Stephen White, Judy Batt and Paul G. Lewiss
Macmillan, 1993
Buku Teks