Ronoh , Obadiah C., Peter Waswa, and John K. Lusweti. “ Effect of Scientific Competencies in Chemistry Practical on Performance in Chemistry Subject ”. African Journal of Education,Science and Technology (AJEST) 6, no. 2 (January 15, 2021): Pg 206–216. Accessed May 18, 2026. http://ajest.org/index.php/ajest/article/view/776.