Gunawan, Lilian, and Nurhayati Masloman. “Correlation of Blood Lead Level and Intelligence Quotient in Children”. Paediatrica Indonesiana 54, no. 3 (June 30, 2014): 127-31. Accessed May 19, 2024. https://www.paediatricaindonesiana.org/index.php/paediatrica-indonesiana/article/view/407.