Hearn, Donald, author
Prentice-Hall, 1986
Buku Teks
Earle, James H., author
Addison-Wesley, 1985
Buku Teks
Harvard Business School Press , 1999
Buku Teks
STSC, 1988
Buku Referensi
edited by Armand M. Nicholi
The Belknap Press of Harvard University Press, 1999
Buku Teks