Jorge O Brusa, et al. “THE INFLUENCE OF EDUCATION, TRAINING AND TEACHING EXPERIENCE ON THE PROFESSIONALISM OF PUBLIC ELEMENTARY SCHOOL TEACHERS IN LANGKAT REGENCY”. Journal of Educational Management, Learning Center and Social Knowledge, vol. 1, no. 2, June 2024, pp. 75-83, https://jedle.org/index.php/ojs/article/view/10.