Cita APA (7th ed.)

Population, R. (1980). Probing our futures: The Philippines 2000 A.D. PREPF.

Cita Chicago (17th ed.)

Population, Resources. Probing Our Futures: The Philippines 2000 A.D. Metro Manila: PREPF, 1980.

Cita MLA (9th ed.)

Population, Resources. Probing Our Futures: The Philippines 2000 A.D. PREPF, 1980.