Umareta, Nurul Ramadhani. “A Literature Review of Depression and Anxiety in Chronic Obstructive Pulmonary Disease (COPD) Patients”. Scientia Psychiatrica 4, no. 1 (August 25, 2021): 339-345. Accessed July 27, 2024. https://scientiapsychiatrica.com/index.php/SciPsy/article/view/97.