Restulingtyas LH, Ricky R, Tarigan ZJH. The Impact of Chain of Servant Leadership on the Effectiveness of Classroom Instruction. aletheia [Internet]. 2025 Oct. 30 [cited 2026 Jul. 24];6(2):113-2. Available from: https://aletheia.petra.ac.id/index.php/aletheia/article/view/356