Kuper, Leo
Vale University Press , 1982
Buku Teks
Baum, Steven K, author
Cambridge University Press, 2008
Buku Teks
Samuel Totten, editor
Routledge, 2009
Buku Teks
Universitas Indonesia, 2006
UI - Skripsi Membership
Almer Reyhan Irsali, author
Fakultas Hukum Universitas Indonesia, 2017
UI - Skripsi Membership