Hatcher, R. A. (1997). The essentials of contraceptive technology: A handbook for clinic staff. John Hopkins Population Information Program.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHatcher, Robert A. The Essentials of Contraceptive Technology: A Handbook for Clinic Staff. Baltimore: John Hopkins Population Information Program, 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHatcher, Robert A. The Essentials of Contraceptive Technology: A Handbook for Clinic Staff. John Hopkins Population Information Program, 1997.
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