Ihwan, Anhar, Ary Nugraha, and Candra Kusuma Negara. 2022. “BALLONS AND BUTEYKO BLOWING EXERCISES AGAINST PEAK CURRENT EXPIRATION OF ASTHMA PATIENTS”. Jurnal EduHealth 13 (01):204-11. https://ejournal.seaninstitute.or.id/index.php/healt/article/view/378.