Beyene, K. G., D. A. Aga, H. G. Borta, and M. A. Tiruneh. “Customers’ Perceptions on Pharmaceutical Regulatory Service Quality in Ethiopia”. International Journal of Drug Regulatory Affairs, Vol. 7, no. 4, Dec. 2019, pp. 28-35, doi:10.22270/ijdra.v7i4.366.