Population, Resources, Environment and the Philippine Future, Development Academy of the Philippines, University of the Philippines (Diliman). School of Economics, & University of the Philippines (Manila). Population Institute. (1980). Probing our futures: The Philippines 2000 A.D. PREPF.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Population, Resources, Environment and the Philippine Future, Development Academy of the Philippines, University of the Philippines (Diliman). School of Economics, و University of the Philippines (Manila). Population Institute. Probing Our Futures: The Philippines 2000 A.D. Metro Manila: PREPF, 1980.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Population, Resources, Environment and the Philippine Future, et al. Probing Our Futures: The Philippines 2000 A.D. PREPF, 1980.