Tyson, Shaum
Prentice-Hall, 2000
Buku Teks
Weightman, Jane
Addison-Wesley, 1999
Buku Teks
Chaousis, Linda
Prentice-Hall, 200
Buku Teks
Alan Lewis
Cambridge University Press, 2018
eBooks
Diadjeng Laraswati Hanindyani
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2008
UI - Tesis (Open)