Cita APA

Silber, S. J., & Barrows, S. (1987). How not to get pregnant: Your guide to simple, reliable contraception. National Book Store.

Citación estilo Chicago

Silber, Sherman J., and Scott Barrows. How Not to Get Pregnant: Your Guide to Simple, Reliable Contraception. Manila: National Book Store, 1987.

Cita MLA

Silber, Sherman J., and Scott Barrows. How Not to Get Pregnant: Your Guide to Simple, Reliable Contraception. National Book Store, 1987.