Orren, Karen
Cambridge University Press, 1991
Buku Teks
Lamparello, Adam, author
NY Routledge, 2017
Buku Teks
Lippincott, Isaac, author
Appleton Century Croffs, 1933
Buku Teks
Emerson
Little,Brown and Company, 1981
Buku Teks
Dessy Raufiana Pramita, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2014
UI - Skripsi (Membership)