Hariyansyah, F. P., K. F. Ferine, and F. A. Nasution. “ANALYSIS CHARACTERISTICS WORK AND THE IMPACT OF NON-PHYSICAL WORK ENVIRONMENT ON PERFORMANCE AT PT. ALVA KARYA PERKASA MEDAN”. International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET), vol. 4, no. 9, Aug. 2025, pp. 2103-12, doi:10.54443/ijset.v4i9.979.