SANDI, D.; YASMIN, D. The Influence Of Work Environment And Motivation On Employee Spirit At Pt Perkebunan Nusantara IV, Gunung Meliau Palm Oil Mill Work Unit. EKOMBIS REVIEW: Jurnal Ilmiah Ekonomi dan Bisnis, v. 12, n. 4, p. 3383–3390, 4 out. 2024.