Bikramjit Rishi, editor
Business Science Reference, an imprint of IGI Global, 2015
Buku Teks
Kotler, Philip, author
Prentice Hall International, 1991
Buku Teks
Kotler, Philip, author
Prentice-Hall, 1991
Buku Teks
edited by Virginia Hooker and Amin Saikal; Institute of Southeast Asian Studies.
ISEAS, 2006
Buku Teks
Sheth, Jagdish N., author
Ohio South-Western Pub, 1989
Buku Teks