The Impact of Principal Leadership on Teacher Quality and Performance: A Mixed-Methods Study in Deli Serdang Regency. Golden Age SCI J ECD [Internet]. 2024 Dec. 31 [cited 2026 Feb. 1];9(4):589-600. Available from: https://ejournal.uin-suka.ac.id/tarbiyah/goldenage/article/view/8418