ebrary, Inc. (1986). Preservation of historical records. National Academy Press.
Chicago-referens (17:e uppl.)ebrary, Inc. Preservation of Historical Records. Washington, D.C.: National Academy Press, 1986.
MLA-referens (9:e uppl.)ebrary, Inc. Preservation of Historical Records. National Academy Press, 1986.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.