United Nations Environment Programme & United Nations Centre for Human Settlements. (1987). Environmental guidelines for settlements planning and management. United Nations Environment Programme. United Nations Centre for Human Settlements (Habitat).
Style de citation Chicago (17e éd.)United Nations Environment Programme et United Nations Centre for Human Settlements. Environmental Guidelines for Settlements Planning and Management. Nairobi, Kenya: United Nations Environment Programme. United Nations Centre for Human Settlements (Habitat), 1987.
Style de citation MLA (9e éd.)United Nations Environment Programme et United Nations Centre for Human Settlements. Environmental Guidelines for Settlements Planning and Management. United Nations Environment Programme. United Nations Centre for Human Settlements (Habitat), 1987.