Não informado. (1971). Human settlements. Centre for Housing, Building and Planning.
Chicago-referens (17:e uppl.)Não informado. Human Settlements. New York: Centre for Housing, Building and Planning, 1971.
MLA-referens (8:e uppl.)Não informado. Human Settlements. Centre for Housing, Building and Planning, 1971.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.