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.
Παραπομπή σε μορφή Chicago (17η εκδ.)Population, Resources, Environment and the Philippine Future, Development Academy of the Philippines, University of the Philippines (Diliman). School of Economics, και University of the Philippines (Manila). Population Institute. Probing Our Futures: The Philippines 2000 A.D. Metro Manila: PREPF, 1980.
Παραπομπή σε μορφή MLA (9th εκδ.)Population, Resources, Environment and the Philippine Future, et al. Probing Our Futures: The Philippines 2000 A.D. PREPF, 1980.