T. Sumonviwat, D. Wattanakitkrileart, K. Pongthavornkamol, and N. Rittayamai, “The Influences of Depression, Identity of Symptoms, Smoking Status, and Number of Daily Drug Doses on Adherence to Inhaled Long-Acting Bronchodilators in Patients with Chronic Obstructive Pulmonary Disease”, ์Nurs Sci J Thail, vol. 37, no. 1, pp. 45–58, Mar. 2019.