Kotler, Philip, author
Prentice-Hall, 1987
Buku Teks
Charns, Martin P., author
Prentice-Hall, 1983
Buku Teks
McLean, Robert A., author
Delmar, 1997
Buku Teks
McLean, Robert A., author
Delmar, 2003
Buku Teks
Duncan, W. Jack, author
Blackwell, 1999
Buku Teks