Kaur, H. ., V. K. . Gupta, A. . Chaudhary, S. . Girdhar, P. . Bansal, and S. . Singh. “Perceived Barriers of Child Immunization Among Mothers of Under-5 Children in Urban Slum of Ludhiana City”. National Journal of Community Medicine, vol. 10, no. 01, Jan. 2019, pp. 22-25, https://www.njcmindia.com/index.php/file/article/view/417.