Cita APA (7a ed.)

Sanchez, C. A. (1991). Population education (psychological, sociological, biological, anthropological) (rev. ed.). National Book Store.

Cita Chicago Style (17a ed.)

Sanchez, Custodiosa A. Population Education (psychological, Sociological, Biological, Anthropological). rev. ed. Manila: National Book Store, 1991.

Cita MLA (9a ed.)

Sanchez, Custodiosa A. Population Education (psychological, Sociological, Biological, Anthropological). rev. ed. National Book Store, 1991.