Kirsh, Steven J., author
Pearson, 2014
Buku Teks
Duffy, Karen G., author
Pearson Prentice Hall, 2004
Buku Teks
Rutter, Michael, author
Cambridge University Press, 1998
Buku Teks
Ovi Nur Utami, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2014
UI - Skripsi (Membership)
Perry, Michael J
Oxford University Press, 1991
Buku Teks