Fadhilah, Nurul, Prihatin Lumbanraja, and Meilita Tryana Sembiring. “The Influence of Human Relation and Work Environment on Employee Performance at Industry and Trade Office of North Sumatera Province”. Quantitative Economics and Management Studies 4, no. 1 (January 3, 2023): 144–150. Accessed April 20, 2026. https://qemsjournal.org/index.php/qems/article/view/1420.