A.S., Gunardi, Suyaka Suyaka, and L. Ratna Budiarso. “A Study on BCG Vaccination Using Bifurcated Needle in Babies”. Paediatrica Indonesiana 19, no. 11-12 (June 16, 2017): 295–301. Accessed May 4, 2025. https://paediatricaindonesiana.org/index.php/paediatrica-indonesiana/article/view/1544.