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.
Chicago-čujuhus (17. p.)United Nations Centre for Human Settlements juo United Nations Environment Programme. Environmental Planning and Management (EPM) Source Book. Nairobi, Kenya: United Nations Centre for Human Settlements : United Nations Environment Programme, 1997.
MLA-čujuhus (9. p.)United Nations Centre for Human Settlements juo United Nations Environment Programme. Environmental Planning and Management (EPM) Source Book. United Nations Centre for Human Settlements : United Nations Environment Programme, 1997.
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