Suprapta, Aloysius, Aditya Listyoko, and Susanthy Djajalaksana. “CPET: Overview and the Use in Cardiac Failure Patients”. Jurnal Klinik dan Riset Kesehatan 1, no. 2 (February 4, 2022): 101-115. Accessed May 17, 2024. http://jk-risk.org/index.php/jk-risk/article/view/16.