Não informado. (2000). Environment and development. American Planning Association.
Chicago-referens (17:e uppl.)Não informado. Environment and Development. Chicago, Ill: American Planning Association, 2000.
MLA-referens (8:e uppl.)Não informado. Environment and Development. American Planning Association, 2000.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.