Ngaruiya, Evelyn, George K’aol, and Kefah Njenga. “Influence of Managing Firm’s Resource Portfolio on Organizational Performance of Pharmaceutical Companies in Kenya”. The University Journal 5, no. 2 (June 13, 2023): 136–149. Accessed May 11, 2026. https://journals.daea.or.ke/index.php/tuj/article/view/197.