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.
Παραπομπή σε μορφή Chicago (17η εκδ.)Philippines. Department of Environment and Natural Resources και Integrated Environmental Management for Sustainable Development Programme. Guidebooks on Sustainable Land Use Planning and Management. Quezon City: Department of Environment and Natural Resources, 1997.
Παραπομπή σε μορφή MLA (9th εκδ.)Philippines. Department of Environment and Natural Resources και Integrated Environmental Management for Sustainable Development Programme. Guidebooks on Sustainable Land Use Planning and Management. Department of Environment and Natural Resources, 1997.