Agnecia Uliarta Simbolon, H., and O. Pendrian. “The Influence of Leadership Style, Organizational Design, and Communication on Employee Performance at the Head Office and Branches at PT XYZ Company”. Jurnal Mantik, vol. 7, no. 2, Aug. 2023, pp. 1561-8, https://iocscience.org/ejournal/index.php/mantik/article/view/4075.