Roemer, John E
Institute of International Studies, University of California, 1975
Buku Teks
Schreiber, Jordan C.
University Press of Cambridge, 1970
Buku Teks
Dizza Aliftsa Agus
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2021
UI - Skripsi Membership
Mann, Richard I.
Gateway Books, 1994
Buku Teks
Brash, Donald T.
Australian National University , 1966
Buku Teks