Melinda, Wulan Natali Sihombing, Adiski Viska Sari, Cut Fitri Rostina and Ara Auza 2026. The effect of education level, work environment and training on employee performance at PT. Karya hevea Indonesia. International Journal of Economics, Business and Innovation Research. 5, 03 (May 2026), 1458-1473. DOI:https://doi.org/10.63922/ijebir.v5i03.3482.