Bearden, William O., author
McGraw-Hill, 2001
Buku Teks
Bearden, William O., author
McGraw-Hill, Irwin, 2007
Buku Teks
Bearden, William O., author
McGraw-Hill/Irwin, 2004
Buku Teks
Kotler, Philip, author
Prentice-Hall, 1996
Buku Teks
Kotler, Philip, author
Prentice-Hall, 2001
Buku Teks