American Planning Association. (1969). Planning. American Society of Planning Officials.
Chicago-referens (17:e uppl.)American Planning Association. Planning. Chicago, Ill: American Society of Planning Officials, 1969.
MLA-referens (8:e uppl.)American Planning Association. Planning. American Society of Planning Officials, 1969.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.