Mullins, John W., author
McGraw-Hill , 2013
Buku Teks
Kotler, Philip, author
Holt, Rinehart and Winston , 1971
Buku Teks
Malhotra, Naresh K.
Prentice-Hall, 2006
Buku Teks
Malhotra, Naresh K.
2006
Multimedia
Chiras, Daniel D., author
The Benyamin/Cumings Publishing Company, 1985
Buku Teks