United Nations Centre for Human Settlements & United Nations Environment Programme. (1997). Environmental planning and management (EPM) source book. United Nations Centre for Human Settlements : United Nations Environment Programme.
Citazione stile Chigago Style (17a edizione)United Nations Centre for Human Settlements e United Nations Environment Programme. Environmental Planning and Management (EPM) Source Book. Nairobi, Kenya: United Nations Centre for Human Settlements : United Nations Environment Programme, 1997.
Citatione MLA (9a ed.)United Nations Centre for Human Settlements e United Nations Environment Programme. Environmental Planning and Management (EPM) Source Book. United Nations Centre for Human Settlements : United Nations Environment Programme, 1997.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.