Sidhu, Tanvir Kaur, and PP S Coonar. “Contraceptive Usage and Awareness Among Postpartum Mothers in Urban Field Practice Area of a Tertiary Hospital”. Indian Journal of Community Health, vol. 27, no. 1, Mar. 2015, pp. 139-42, http://iapsmupuk.org/journal/index.php/IJCH/article/view/546.