Dolgoff, Ralph, author
Thomson Brooks/Cole, 2012
Buku Teks
Loewenberg, Frank
F.E. Peacock Publishers, Inc, 1988
Buku Teks
Rhodhes, Margaret L., author
Routledge and Kegan Paul, 1986
Buku Teks
edited by Richard Hugman, David Smith
Routledge, 1996
Buku Teks
Buku Teks