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).
Παραπομπή σε μορφή Chicago (17η εκδ.)United Nations Environment Programme και 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.
Παραπομπή σε μορφή MLA (9th εκδ.)United Nations Environment Programme και 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.