SUDUNG SIMATUPANG; MARTO SILALAHI; KEVIN INDAJANG; INJEN PARDAMEAN BUTARBUTAR. Employee Performance Influenced by Transformational Leadership and Work Spirit. Journal of Innovation in Education and Social Research, [S. l.], v. 1, n. 1, p. 1–14, 2023. Disponível em: https://journals.proindex.uz/index.php/JIESR/article/view/1. Acesso em: 4 apr. 2026.