Tarigan, A. P. S., & Juliandi, J. (2019). PERNAFASAN PURSED LIP BREATHING MENINGKATKAN SATURASI OKSIGEN PENDERITA PENYAKIT PARU OBSTRUKTIF KRONIS (PPOK) DERAJAT II. JURNAL ONLINE KEPERAWATAN INDONESIA, 1(2), 39–46. Retrieved from https://e-journal.sari-mutiara.ac.id/index.php/Keperawatan/article/view/426