Crockatt, Richard, author
Oxford University Press, 2016
eBooks
Gorbachev, Mikhail, author
I.B. Tauris, 2005
Buku Teks
MacIntyre, Alasdair, author
Rontledge , 1998
Buku Teks
edited by Jack A. Goldstone, Ted Robert Gurr, Farrokh Moshiri
Westview Press, 1991
Buku Teks
Varga, Eugen, 1879-1964, author
Foreign Languages Publishing House, 1961
Buku Teks