Philippines. Department of Environment and Natural Resources & Integrated Environmental Management for Sustainable Development Programme. (1997). Guidebooks on sustainable land use planning and management. Department of Environment and Natural Resources.
Chicago-referens (17:e uppl.)Philippines. Department of Environment and Natural Resources och Integrated Environmental Management for Sustainable Development Programme. Guidebooks on Sustainable Land Use Planning and Management. Quezon City: Department of Environment and Natural Resources, 1997.
MLA-referens (9:e uppl.)Philippines. Department of Environment and Natural Resources och Integrated Environmental Management for Sustainable Development Programme. Guidebooks on Sustainable Land Use Planning and Management. Department of Environment and Natural Resources, 1997.