Karmany, Putu Anggi Widia, Setyo Sri Rahardjo, and Bhisma Murti. 2021. “The Effects of Non-Exclusive Breastfeeding on the Risk of Pneumonia in Children under Five: Meta-Analysis”. Journal of Epidemiology and Public Health 5 (4):393-401. https://jepublichealth.com/index.php/jepublichealth/article/view/342.