Siregar, Helena, Azwin Lubis, M. Nasution, Indra Nasution, and Thamrin Tanjung. “Family Size and Marital Age”. Paediatrica Indonesiana 25, no. 5-6 (April 25, 2019): 107-11. Accessed November 23, 2024. https://paediatricaindonesiana.org/index.php/paediatrica-indonesiana/article/view/2192.