Rothberg, Helen N, author
Elsevier Butterworth-Heinemann, 2005
Buku Teks
Porter, Michael E., author
The Free Press, 1985
Buku Teks
edited by Susan E. Jackson, Michael A. Hitt and Angelo S. DeNisi
Jossey-Bass, 2003
Buku Teks
Porter, Michael E., author
The Free Press , 1985
Buku Teks
Hatten, Kenneth J., author
AMACOM, 2001
Buku Teks