Bangkara, B. A., I. R. Maruf, M. Stiadi, J. H. Sinaulan, and A. Nirwana AN. “Supervision Design With Clinical Approach to Improve Principal Managerial Competence: Secondary Data Database Analysis”. International Journal of Health Sciences, vol. 6, no. S4, May 2022, pp. 2227-38, doi:10.53730/ijhs.v6nS4.7167.