Saputra, D., and S. Sopiah. “The Influence of Leadership on Motivation and Performance of Employees in Kunto Darusalam District, Rokan Hulu Regenc”. Jurnal Mantik, vol. 5, no. 3, Nov. 2021, pp. 2026-32, https://iocscience.org/ejournal/index.php/mantik/article/view/1834.