Barus, Mardiati, Murni Sari Dewi Simanullang, and Erni Cahyani Putri Gea. “PENGARUH PROGRESSIVE MUSCLE RELAXATION TERHADAP TINGKAT KECEMASAN PRE OPERASI DI RUMAH SAKIT SANTA ELISABETH MEDAN TAHUN 2018”. JURNAL MUTIARA NERS 1, no. 2 (September 24, 2018): 98–108. Accessed November 5, 2024. http://114.7.97.221/index.php/NERS/article/view/358.