Philippines. Department of Environment and Natural Resources, United Nations Development Programme, & Philippines. National Economic Development Authority. (1997). A sourcebook of sustainable development indicators. Department of Environment and Natural Resources.
Cita Chicago (17th ed.)Philippines. Department of Environment and Natural Resources, United Nations Development Programme, i Philippines. National Economic Development Authority. A Sourcebook of Sustainable Development Indicators. Quezon City: Department of Environment and Natural Resources, 1997.
Cita MLA (9th ed.)Philippines. Department of Environment and Natural Resources, et al. A Sourcebook of Sustainable Development Indicators. Department of Environment and Natural Resources, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.