Kohls, Richard L.
Macmillan, 1969
Buku Teks
Kotler, Philip, author
Prentice-Hall, 1996
Buku Teks
Kotler, Philip, author
Prentice-Hall, 2001
Buku Teks
Kotler, Philip, author
Prentice-Hall, 1999
Buku Teks
Kurtz, David L., author
The Dryden Press , 1981
Buku Teks