Whetten, David A., author
Prentice-Hall, 2000
Buku Teks
Artikel Jurnal
Buell, Victor P., author
Pan Books, [date of publication not identified]
Buku Teks
Newman, William H., author
Prentice-Hall of Japan, 1963
Buku Teks
Cabell, Randolph W.
John Wiley & Sons, 1961
Buku Teks