Siziba, L., J. Jerling, S. Hanekom, and E. Wentzel-Viljoen. “Low Rates of Exclusive Breastfeeding Are Still Evident in Four South African Provinces”. South African Journal of Clinical Nutrition, Vol. 28, no. 4, Sept. 2015, pp. 170-9, http://www.sajcn.co.za/index.php/SAJCN/article/view/996.