Saifurrahman M, Sudira P, Daryono RW. The Determinant Factor of the Principal Leadership Solutions in Facing the 21st-Century Learning. JPP [Internet]. 2021 Jul. 17 [cited 2024 May 4];54(2):230-43. Available from: https://ejournal.undiksha.ac.id/index.php/JPP/article/view/34102