Agus Salim Marpaung, Berlin Sibarani. An Investigation of School Leadership in the Effective Implementation of Bilingual Education in Indonesia: A Case Study. AJSHR [Internet]. 2024 Jun. 29 [cited 2025 Aug. 27];5(6):46-52. Available from: https://globalresearchnetwork.us/index.php/ajshr/article/view/2817