Schneekloth, Lynda H.
John Wiley & Sons, 1995
Buku Teks
Hogrefe, 2005
Buku Teks
edited by Ralph M. Kramer, Harry Specht
Prentice-Hall, 1983
Buku Teks
Bernick, Michael
McGraw-Hill, 1997
Buku Teks
Abdul Radjak, author
[Publisher not identified], 2002
Buku Teks