Philippines. Department of Environment and Natural Resources, United States Agency for International Development (USAID), International Resources Group (IRG), Ltd, Edgevale Associates, Silver Spring, MD., U.S.A, & Mandala Agricultural Development Corp. (MADECOR) Philippines. (1992). The Philippine natural resources accounting project (NRAP-Phase I): Main report. Philippines Environmental Accounting Project.
Cita Chicago (17th ed.)Philippines. Department of Environment and Natural Resources, United States Agency for International Development (USAID), Ltd International Resources Group (IRG), Silver Spring Edgevale Associates, MD., i Mandala Agricultural Development Corp. (MADECOR) Philippines. The Philippine Natural Resources Accounting Project (NRAP-Phase I): Main Report. Quezon City: Philippines Environmental Accounting Project, 1992.
Cita MLA (9th ed.)Philippines. Department of Environment and Natural Resources, et al. The Philippine Natural Resources Accounting Project (NRAP-Phase I): Main Report. Philippines Environmental Accounting Project, 1992.