Lubis AA, Tirtayasa S. Impact of Education and Training on Employee Performance at the North Sumatra Center for Teachers and Educational Personnel (BBGTK). DigTrenBis [Internet]. 2026 Jun. 1 [cited 2026 Jun. 4];17(2):24-31. Available from: https://ejournal.cria.or.id/index.php/db/article/view/429