Indriani Adha, Anggia Sari Lubis, Wan Dian Safina and Horia Siregar (2024) “THE INFLUENCE OF SELF EFFICACY AND LOCUS OF CONTROL ON EMPLOYEE PERFORMANCE AT PT.GUARDIAN PHARMATAMA MEDAN BRANCH”, International Conference on Health Science, Green Economics, Educational Review and Technology, 6(1), pp. 99–105. doi: 10.54443/ihert.v6i1.365.