edited by George Zinkhan
American Marketing Association, 2000
Buku Teks
Peter, J. Paul, author
McGraw-Hill, 1999
Buku Teks
Howard, John A., author
Prentice-Hall, 1989
Buku Teks
Peter, J. Paul, author
Mc Graw-Hill, 2001
Buku Teks
Hawkins, Del I., author
McGraw-Hill, 2004
Buku Teks