National Standards Association (U.S.). The National directory of state agencies. Cambridge Information Group Directories [etc.].
Chicago-referens (17:e uppl.)National Standards Association (U.S.). The National Directory of State Agencies. Bethesda, Md: Cambridge Information Group Directories [etc.].
MLA-referens (9:e uppl.)National Standards Association (U.S.). The National Directory of State Agencies. Cambridge Information Group Directories [etc.].
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.