Abracosa, R., & Ortolano, L. Evaluation of the Philippine Environmental Impact Statement System: 1977-1985. Philippine planning journal.
Cita Chicago (17th ed.)Abracosa, Ramon, i Leonardo Ortolano. "Evaluation of the Philippine Environmental Impact Statement System: 1977-1985." Philippine Planning Journal .
Cita MLA (9th ed.)Abracosa, Ramon, i Leonardo Ortolano. "Evaluation of the Philippine Environmental Impact Statement System: 1977-1985." Philippine Planning Journal, .
Atenció: Aquestes cites poden no estar 100% correctes.