Jansson, Bruce S., author
Brooks/Cole; cengage learning, 2009
Buku Teks
edited by Ilona Burchroth, Chris Parkin
Learning Matters, 2010
Buku Teks
UNSW
UNSW, 2000
Buku Teks
Loewenberg, Frank
F.E. Peacock Publishers, Inc, 1988
Buku Teks
Coulshed, Veronica, author
Macmillan, 1988
Buku Teks