Kingu, U., J. Ismail, and S. Kibusi. “Leadership Competencies of Primary Healthcare Managers: A Cross-Sectional Quantitative Study of High, Medium and Low Performing District Councils in Tanzania”. Research Journal of Health Sciences, vol. 11, no. 4, July 2023, pp. 307-16, https://rjhs.org/index.php/home/article/view/28.