Yip, George S., author
Prentice-Hall, 1995
Buku Teks
Harvard Business School Publishing, 1991
Buku Teks
Agus Purnomo, author
Fakultas Teknik Universitas Indonesia, 2008
UI - Tesis (Open)
Hamper, Robert J., author
McGraw-Hill, 2014
Buku Teks
prepared by Business International Corporation
Business International Corporation,, 1991
Buku Teks