“Analysis of the Determinants of Oil Palm Harvest Workers’ Productivity Using Multiple Linear Regression: A Case Study of PTPN IV Regional 1, Bangun Estate”, j.sos.ekon.pertan., vol. 22, no. 1, hlm. 93–101, Jun 2026, Diakses: Agu 21, 2026. Tersedia pada: https://journal.unhas.ac.id/index.php/jsep/article/view/52102