Snyder, Richard C., author
Free Press, 1962
Buku Teks
Kevin Joel Anthony, author
2018
UI - Skripsi (Membership)
edited by Roy C. Macridis
Prentice-Hall, 1992
Buku Teks
Shekhar, Vibhanshu, author
Routledge, 2018
eBooks
edited by Coral Bell
Australian National University Press, 1980
Buku Teks