edited by Jack A. Goldstone, Ted Robert Gurr, Farrokh Moshiri
Westview Press, 1991
Buku Teks
Pearson, Frederic S., author
McGraw-Hill, 1992
Buku Teks
Hinton, James, author
Oxford University Press, 2016
eBooks
Artikel Jurnal
Dordrecht Martinus Nijhoff, 1992
Buku Teks