Sarmila, Besse, Burhanuddin Iskandar, and Dasril Daud. “Diagnostic Value of Electrocardiography for Ventricular Septal Defect”. Paediatrica Indonesiana 59, no. 2 (March 29, 2019): 87-91. Accessed November 22, 2024. https://paediatricaindonesiana.org/index.php/paediatrica-indonesiana/article/view/2036.