Sudung Simatupang, Marto Silalahi, Kevin Indajang, Injen Pardamean Butarbutar. Employee Performance Influenced by Transformational Leadership and Work Spirit. jiesr [Internet]. 2023 Jun. 1 [cited 2026 Apr. 4];1(1):1-14. Available from: https://journals.proindex.uz/index.php/JIESR/article/view/1