Hughes, B. B. (1997). Continuity and chance in world politics: Competing perspectives (3rd ed.). Prentice Hall.
Chicago-referens (17:e uppl.)Hughes, Barry B. Continuity and Chance in World Politics: Competing Perspectives. 3rd ed. New Jersey: Prentice Hall, 1997.
MLA-referens (9:e uppl.)Hughes, Barry B. Continuity and Chance in World Politics: Competing Perspectives. 3rd ed. Prentice Hall, 1997.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.