Ali, Muhammad, Ifan Saputra, Adillida Adillida, Sri Sofyani, and Iskandar Lubis. “Knowledge, Attitude, and Practice of Working and Non-Working Mothers Concerning Immunization of Underfive Children”. Paediatrica Indonesiana 44, no. 3 (October 10, 2016): 101-5. Accessed April 19, 2024. https://paediatricaindonesiana.org/index.php/paediatrica-indonesiana/article/view/745.