Helen Dwight Reid Educational Foundation. (1990). Perspectives on political science. Heldref Publications.
Chicago-referens (17:e uppl.)Helen Dwight Reid Educational Foundation. Perspectives on Political Science. Washington, D.C.: Heldref Publications, 1990.
MLA-referens (9:e uppl.)Helen Dwight Reid Educational Foundation. Perspectives on Political Science. Heldref Publications, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.