APA (7th ed.) Citation

Sanchez, C. A., & Agpaoa, F. B. (1997). Contemporary social problems and issues (3rd ed.). National Bookstore.

Chicago Style (17th ed.) Citation

Sanchez, Custodiosa A., and Fe B. Agpaoa. Contemporary Social Problems and Issues. 3rd ed. Mandaluyong: National Bookstore, 1997.

MLA (9th ed.) Citation

Sanchez, Custodiosa A., and Fe B. Agpaoa. Contemporary Social Problems and Issues. 3rd ed. National Bookstore, 1997.