Sularyo, Titi, Ulynar Marpaung, and Arwin Akib. “Profile of Mother’s Knowledge and Behavior Toward Stimulation and Their Babies’ Development in an Urban Poor Area in Jakarta”. Paediatrica Indonesiana 39, no. 9-10 (October 30, 1999): 278-86. Accessed November 23, 2024. https://paediatricaindonesiana.org/index.php/paediatrica-indonesiana/article/view/1783.