Delury, G. E. (1987). World encyclopedia of political systems & parties (2nd edition.). Facts on File Publications.
Chicago-referens (17:e uppl.)Delury, George E. World Encyclopedia of Political Systems & Parties. 2nd edition. New York: Facts on File Publications, 1987.
MLA-referens (9:e uppl.)Delury, George E. World Encyclopedia of Political Systems & Parties. 2nd edition. Facts on File Publications, 1987.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.