Salim, Simon, Muhammad Yamin, Idrus Alwi, and Siti Setiati. 2017. “Validity and Reliability of the Indonesian Version of SF-36 Quality of Life Questionnaire on Patients With Permanent Pacemakers”. Acta Medica Indonesiana 49 (1):10-16. http://www.actamedindones.org/index.php/ijim/article/view/275.