PUTRI, H. H.; DALIMUNTHE , R. F. .; SILALAHI, A. S. . The Influence Of Self-Efficacy And Transformational Leadership On Employee Performance At PT Pertamina (Persero) Regional North Sumatra. DAS CONFERENCE INTERNATIONAL SERIES, [S. l.], v. 4, p. 220–225, 2026. Disponível em: https://www.das-institute.com/journal/index.php/proceeding/article/view/1425. Acesso em: 24 jun. 2026.