SIREGAR, B. A. RELATIONSHIP OF SELF-EFFICACY TO IMPROVING EMPLOYEE PERFORMANCE: A STUDY IN MEDAN CITY . Strategic Management Business Journal, [S. l.], v. 1, n. 01, p. 58–70, 2021. DOI: 10.55751/smbj.v1i01.7. Disponível em: https://journal.smbjupmi.com/index.php/smbj/article/view/7. Acesso em: 21 jan. 2025.