Wardhani, H., M. C. Rachmasari, and A. Puryani. “The Relationship Between Exclusive Breastfeeding and Tonsillitis in Children Aged 0-7 Years”. Journal of Maternal and Child Health, vol. 5, no. 3, May 2020, pp. 243-50, http://thejmch.com/index.php/thejmch/article/view/392.