Polk, William R. (William Roe), 1929-, author
St. Martin's Press, 1979
Buku Teks
Abboushi, W.F., 1931-, author
Dodd, Mead, 1971
Buku Teks
R. Achmad Sunjayadi, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2019
Artikel Jurnal
edited by Jack A. Goldstone, Ted Robert Gurr, Farrokh Moshiri
Westview Press, 1991
Buku Teks
Black, C.E., author
Alfred A. Knopf, 1961
Buku Teks