Coplin, William D.
Duxbury Press, 1974
Buku Teks
Gabriel Adi Hizkia, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2022
UI - Skripsi (Membership)
edited by Jack Elinson, Anne Mooney, and Athilia E. Siegmann
Westview Press, 1977
Buku Teks
Sage Publications, 1980
Buku Teks
edited by Edward J. Mitchell
American Enterprise Institute for Public Policy Research, 1983
Buku Teks