DUHA, T. The work performance employees of the environmental service of south nias district was examined from the effect of work ethic and communication: Work Ethic; Communication; Work Performance;. Journal of Management Science (JMAS), [S. l.], v. 6, n. 3, p. 462–469, 2023. Disponível em: https://exsys.iocspublisher.org/index.php/JMAS/article/view/272. Acesso em: 30 jun. 2026.