Yusof, Yusmarwati, et al. “Competencies Needed for Improving Teaching Among Lecturers of Polytechnics in North-Western Nigeria”. Journal of Technical Education and Training, vol. 15, no. 1, Mar. 2023, pp. 1-8, https://publisher.uthm.edu.my/ojs/index.php/JTET/article/view/13504.