Campbell, Robert W.
Harvard University Press, 1963
Buku Teks
Garrison, Ray H.
McGraw-Hill, 2001
Multimedia
Zimmerman, Jerold L., 1947-
McGraw-Hill, 1997
Buku Teks
Zimmerman, Jerold L., 1947-
McGraw-Hill, 2003
Buku Teks
Neeley, L. Paden
South-Western Publishing, 1991
Buku Teks