Hatcher, R. A. (1997). The essentials of contraceptive technology: A handbook for clinic staff. Baltimore, MD: Population Information Program : Center for Communication Programs : Johns Hopkins School of Public Health.
Παραπομπή Chicago StyleHatcher, Robert Anthony. The Essentials of Contraceptive Technology: A Handbook for Clinic Staff. Baltimore, MD: Population Information Program : Center for Communication Programs : Johns Hopkins School of Public Health, 1997.
Παραπομπή MLAHatcher, Robert Anthony. The Essentials of Contraceptive Technology: A Handbook for Clinic Staff. Baltimore, MD: Population Information Program : Center for Communication Programs : Johns Hopkins School of Public Health, 1997.
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