Thurman, Harold U.
Merril Publishing company , 1988
Buku Teks
Thurman, Harold V.
Charles E. Merrill Publishing Company, 1975
Buku Teks
Anderson, Franz E., author
Burgess Publishing, 1979
Buku Teks
Davis, Richard A., author
Wm.C. Brown Publishers, 1991
Buku Teks
Gross, M. Grant, author
Prentice-Hall, 1995
Buku Teks