ONYANGO, MARSEILLE ACHIENG, Paul Katuse, and Peter Kiriri. “Assessing the Influence of Product Orientation on Sustained Competitive Advantage Among Pharmaceutical Firms in Kenya”. Kabarak Journal of Research & Innovation 16, no. 2 (July 18, 2026): 378–395. Accessed July 22, 2026. https://journals.kabarak.ac.ke/index.php/kjri/article/view/778.