McClave, James T., author
Prentice-Hall, 2001
Buku Teks
Anderson, David Ray, 1941-, author
Thomson South-Western, 2008
Multimedia
Shao, Stephen P., author
Charles E. Merrill, 1976
Buku Teks
Mills, Richard L., author
McGraw-Hill Kogakusha, 1977
Buku Teks
Anderson, David R., author
Thomson, 2008
Buku Teks