MHD. ASAAD, RASIDIN KARO-KARO SITEPU, Indra Yudistira,. The Influence of Leadership, Motivation, Discipline and Work Environment on the Performance of Employees at Batang Laping (BALAP) PTPN IV. Journal Economy and Currency Study (JECS), [S. l.], v. 5, n. 2, p. 40–47, 2023. DOI: 10.51178/jecs.v5i2.1436. Disponível em: https://pusdikra-publishing.com/index.php/jecs/article/view/1436. Acesso em: 1 aug. 2025.