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.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Population, Resources, Environment and the Philippine Future, Development Academy of the Philippines, University of the Philippines (Diliman). School of Economics, và University of the Philippines (Manila). Population Institute. Probing Our Futures: The Philippines 2000 A.D. Metro Manila: PREPF, 1980.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)Population, Resources, Environment and the Philippine Future, et al. Probing Our Futures: The Philippines 2000 A.D. PREPF, 1980.