Cita APA (7th ed.)

Hatcher, R. A. (1997). The essentials of contraceptive technology. Population Information Program, Johns Hopkins School of Public Health.

Cita Chicago (17th ed.)

Hatcher, Robert A. The Essentials of Contraceptive Technology. Baltimore, MD: Population Information Program, Johns Hopkins School of Public Health, 1997.

Cita MLA (9th ed.)

Hatcher, Robert A. The Essentials of Contraceptive Technology. Population Information Program, Johns Hopkins School of Public Health, 1997.