Silber, S. J., & Barrows, S. (1987). How not to get pregnant: Your guide to simple, reliable contraception. National Book Store.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSilber, Sherman J., और Scott Barrows. How Not to Get Pregnant: Your Guide to Simple, Reliable Contraception. Manila: National Book Store, 1987.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSilber, Sherman J., और Scott Barrows. How Not to Get Pregnant: Your Guide to Simple, Reliable Contraception. National Book Store, 1987.
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