Cohen, Steven, author
Jossey-Bass, 1993
Buku Teks
Bank, John, author
Prentice-Hall, 2000
Buku Teks
Fandy Tjiptono, author
Andi Offset, 1996
Buku Teks
Lewis, Ralph G., author
St. Lucie Press, 1994
Buku Teks
Gadih Ranti, author
Fakultas Teknik Universitas Indonesia, 2004
UI - Tesis Membership