Harne, P., and A. M. Khan. “Awareness and Usage of Emergency Contraceptive Pills Among Working Women: A Hospital Based Survey from North India”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 5, no. 4, Dec. 2016, pp. 1202-6, doi:10.18203/2320-1770.ijrcog20160885.