NEPC-UPNSRC Manpower Development Program. Training Program on Environmental Protection, Philippines. National Environmental Protection Council, & University of the Philippines. Natural Science Research Center. (1977). Report on NEPC-UPNSRC Manpower Development Program, Training Program on Environmental Protection: Fundamentals of ecology. Natural Science Research Center, University of the Philippines.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)NEPC-UPNSRC Manpower Development Program. Training Program on Environmental Protection, Philippines. National Environmental Protection Council, و University of the Philippines. Natural Science Research Center. Report on NEPC-UPNSRC Manpower Development Program, Training Program on Environmental Protection: Fundamentals of Ecology. [Quezon City]: Natural Science Research Center, University of the Philippines, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)NEPC-UPNSRC Manpower Development Program. Training Program on Environmental Protection, et al. Report on NEPC-UPNSRC Manpower Development Program, Training Program on Environmental Protection: Fundamentals of Ecology. Natural Science Research Center, University of the Philippines, 1977.