APA (7th ed.) Citation

von Hertzen, H., & Godfrey, E. M. (2012). Emergency Contraception: The State of the Art.

Chicago Style (17th ed.) Citation

von Hertzen, H., and E. M. Godfrey. Emergency Contraception: The State of the Art. 2012.

MLA (8th ed.) Citation

von Hertzen, H., and E. M. Godfrey. Emergency Contraception: The State of the Art. 2012.

Warning: These citations may not always be 100% accurate.