Não informado. (1973). Teaching political science. Heldref Publications.
Chicago-referens (17:e uppl.)Não informado. Teaching Political Science. Washington: Heldref Publications, 1973.
MLA-referens (8:e uppl.)Não informado. Teaching Political Science. Heldref Publications, 1973.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.