University Center for International Studies. (2004). Historical Methods. Heldref Publications.
Chicago-referens (17:e uppl.)University Center for International Studies. Historical Methods. Washington: Heldref Publications, 2004.
MLA-referens (8:e uppl.)University Center for International Studies. Historical Methods. Heldref Publications, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.