Westview Press, 1985
Buku Teks
Herter, Christian A., author
Harper & Row, 1963
Buku Teks
M. Mardani Arrahman, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 1970
UI - Tugas Akhir
Simon, Jeffrey
Westview Press, 1985
Buku Teks
Robins, C. Richard, author
Houghton-Miffiln, 1986
Buku Teks