Duxbury, Alison B.
McGraw-Hill, 2002
Buku Teks
Stowe, Keith S., 1943-
John Wiley & Sons, 1979
Buku Teks
Thurman, Harold V.
Charles E. Merrill Publishing Company, 1975
Buku Teks
Williams, Joreme
Little, Brown And Company, 1962
Buku Teks
Davis, Richard A.
Wm.C. Brown Publishers, 1996
Buku Teks