APA (7th ed.) Citation

Sanchez, C. A., & Agpaoa, F. A. B. (1987). Contemporary social problems and issues (Revised edition.). National Book Store.

Chicago Style (17th ed.) Citation

Sanchez, Custodiosa Ancheta, and Fe A. Barbado Agpaoa. Contemporary Social Problems and Issues. Revised edition. Manila: National Book Store, 1987.

MLA (9th ed.) Citation

Sanchez, Custodiosa Ancheta, and Fe A. Barbado Agpaoa. Contemporary Social Problems and Issues. Revised edition. National Book Store, 1987.