Feldman, Robert S., author
McGraw-Hill, 1989
Buku Teks
Gilmer, B. von Haller (Beverly von Haller), 1909-1994, author
McGraw-Hill, 1967
Buku Teks
Schein, Edgar H., author
Prentice-Hall, 1980
Buku Teks
Bass, Bernard M., author
Allyn and Bacon, 1979
Buku Teks
Kolb, David A., author
Prentice-Hall, 1974
Buku Teks