Alex Harry, Richard Cambel, Weinman Burok. THE INFLUENCE OF LEARNING MANAGEMENT TRAINING AND LEARNING MATERIAL DEVELOPMENT ON THE PROFESSIONALISM OF ELEMENTARY SCHOOL TEACHERS IN BINJAI CITY. JEDLE JOURNAL [Internet]. 2024 Mar. 30 [cited 2026 Jun. 1];1(1):17-24. Available from: https://jedle.org/index.php/ojs/article/view/3