Kibwage, I., E. Ayiemba, and C. Ondari. “Drug Utilization and Cost Patterns in Selected Health Care Facilities in Kenya”. The East and Central African Journal of Pharmaceutical Sciences, Vol. 1, no. 1, July 2020, pp. 11-14, https://uonjournals.uonbi.ac.ke/ojs/index.php/ecajps/article/view/521.