Purba, Daniel Gaolan, Muhammad Fauzan Azhmy, and Muller Tamba. “PENGARUH GAYA KEPEMIMPINAN, MOTIVASI, REWARD DAN PUNISHMENT TERHADAP KINERJA KARYAWAN PT. PERKEBUNAN NUSANTARA II KEBUN HELVETIA”. JaManKu: Jurnal Manajemen dan Kewirausahaan 4, no. 2 (November 17, 2023): 36–47. Accessed August 30, 2025. https://jurnal.harapan.ac.id/index.php/JaManKu/article/view/820.