Yoan, Clarisa, et al. “THE INFLUENCE OF PRINCIPALS’ MANAGERIAL SUPERVISION ON TEACHER PERFORMANCE AT SD NEGERI 066044 MEDAN HELVETIA IN THE 2025 2026”. Jurnal Buah Hati , vol. 13, no. 2, Sept. 2026, pp. 103-17, https://ejournal.bbg.ac.id/index.php/buahhati/article/view/4090.