University of the Philippines in the Visayas, Department of Environment and Natural Resources, & United Nation Development Programme. (1993). Environmental planning and maintenace for sustainable development: Executive summary. University of the Philippines in the Visayas.
Style de citation Chicago (17e éd.)University of the Philippines in the Visayas, Department of Environment and Natural Resources, et United Nation Development Programme. Environmental Planning and Maintenace for Sustainable Development: Executive Summary. Miagao, Iloilo, Philippines: University of the Philippines in the Visayas, 1993.
Style de citation MLA (9e éd.)University of the Philippines in the Visayas, et al. Environmental Planning and Maintenace for Sustainable Development: Executive Summary. University of the Philippines in the Visayas, 1993.