UNSW
UNSW, 2000
Buku Teks
Anderson, David
Macmillan, 1982
Buku Teks
Loewenberg, Frank
F.E. Peacock Publishers, Inc, 1988
Buku Teks
Healy, Karen, author
Palgrave Macmillan, 2005
Buku Teks
Cournoyer, Barry R., author
Brooks/Cole Cengage Learning, 2011
Buku Teks