Cravens, David W., author
McGraw-Hill , 2006
Buku Teks
Cravens, David W., author
Erlangga, 1996
Buku Teks
Cravens, David W., author
McGraw-Hill Irwin, 2002
Buku Teks
Kotler, Philip, author
Prentice-Hall, 1995
Buku Teks
Kerin, Roger A., author
Prentice Hall international, 2001
Buku Teks