Facts On File, 1978
Buku Teks
University of Notre Dame Press, 1979
Buku Teks
Tri Marsudi, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2004
UI - Tesis (Membership)
edited by Ronald Cohen and Elman R. Service
Institute for the Study of Human Issues, 1978
Buku Teks
Emerson
Little,Brown and Company, 1981
Buku Teks