Quelch, John A., author
Prentice-Hall, 2001
Buku Teks
Bernhardt, Kenneth L
Bussiness Publications, 1985
Buku Teks
Bernhardt, Kenneth L
Irwin, 1997
Buku Teks
M. Aulia Maharlika, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2006
UI - Tesis (Membership)
Prentice-Hall, 2000
Buku Teks