Tyson, Shaun
New York, 1992
Buku Teks
Robbins, Stephen P.
Prentice-Hall, 2009
Buku Teks
Weightman, Jane
Addison-Wesley, 1999
Buku Teks
Diadjeng Laraswati Hanindyani
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2008
UI - Tesis (Open)
Rogers, John
Cloustan and Hall, 1988
Buku Teks