Moorhead, Gregory, author
South-Western Cengage Learning, 2012
Buku Teks
French, Wendell L., author
Harper & Row, 1985.
Buku Teks
Staw, Barry M., author
Macmillan, 1991
Buku Teks
Kolb, David A., author
Prentice-Hall, 1995
Buku Teks
Griffin, Ricky W., author
Cengage Learning, 2014
Buku Teks