Quelch, John A., author
Prentice-Hall, 2001
Buku Teks
Cravens, David W., author
McGraw-Hill Irwin, 2002
Buku Teks
Swayne, Linda E., author
Prentice-Hall International, 1989
Buku Teks
Kerin, Roger A., author
Pearson, 2013
Buku Teks
Hoffman, K. Douglas, author
Cengage Learning, 2017
Buku Teks