Fitra Arlina Nasution. “The Influence Of Spirit, Leadership Style, And Ethic On Performance Employees Bank BRI Medan”. Jurnal Scientia 13, no. 03 (August 8, 2024): 734-744. Accessed August 18, 2025. http://seaninstitute.org/infor/index.php/pendidikan/article/view/2553.