Gebre Tirfe, G., and L. G. Hordofa. “Factors Affecting Chronic Patients Brand Preference of Pharmaceutical Products in Ethiopia: Hawassa City”. IJO -International Journal of Business Management ( ISSN 2811-2504 ), Vol. 5, no. 05, May 2022, pp. 32-46, https://www.ijojournals.com/index.php/bm/article/view/560.