Thurman, Harold V.
Charles E. Merrill Publishing Company, 1975
Buku Teks
Thurman, Harold U.
Merril Publishing company , 1988
Buku Teks
Anderson, Franz E., author
Burgess Publishing, 1979
Buku Teks
Apel, John R., author
Academic Press, 1987
Buku Teks
Duxbury, Alison B.
McGraw-Hill, 2002
Buku Teks