Hill, Charles W. L., author
Houghton Miffinn, 1989
Buku Teks
Torgersen, Paul E., author
Prentice-Hall, 1972
Buku Teks
edited by Bart Van Looy, Roland Van Dierdonck and Paul Gemmel
Financial Times Management, 1998
Buku Teks
Arens, Alvin A., author
Englewood Cliffs, N.J., Prentice-Hall of Southeast Asia
Buku Teks
Osborn, Richard N., author
John Wiley & Sons, 1980
Buku Teks