Novarin, C., Murtaqib, M., & Widayati, N. 2015 May 15. Pengaruh Progressive Muscle Relaxation terhadap Aliran Puncak Ekspirasi Klien dengan Asma Bronkial di Poli Spesialis Paru B Rumah Sakit Paru Kabupaten Jember (The Effect of Progressive Muscle Relaxation on Peak Expiratory Flow of Clients with Bronchial As. Pustaka Kesehatan. [Online] 3:2