Weightman, Jane, author
Addison-Wesley, 1999
Buku Teks
Tyson, Shaum, author
Prentice-Hall, 2000
Buku Teks
Rogers, John, author
Cloustan and Hall, 1988
Buku Teks
Chaousis, Linda, author
Prentice-Hall, 200
Buku Teks
Diadjeng Laraswati Hanindyani, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2008
UI - Tesis (Open)