Myers, David G., author
Worth Publishers, 2001
Buku Teks
Hartley, B., author
Chapman and Hall, 1992
Buku Teks
Bennis, Warren G., author
Harper and Row, 1968
Buku Teks
edited by Ronald G. Knapp.
Oxford University Press, 2003
Buku Teks
Cai, Yanxin, author
Intercontinental Press, 2010
Buku Teks