Muthoharoh, Anies, Rahayu Anggraini, and Wesiana Santy. “Spiritual Deep Breathing Exercise Is Effective In Reducing Anxiety And Stabilizing Oxygen Saturation In COVID-19 Patients”. Interest : Jurnal Ilmu Kesehatan (January 3, 2022): 166-176. Accessed May 21, 2022. http://jurnalinterest.com/index.php/int/article/view/346.