MAPPI, Safrida. PENGARUH MODAL, LUAS LAHAN, JUMLAH TENAGA KERJA TERHADAP PENDAPATAN USAHATANI KELAPA SAWIT DI KECAMATAN RAYA KAHEAN KABUPATEN SIMALUNGUN. Agriprimatech, [S. l.], v. 2, n. 1, p. 55–61, 2019. Disponível em: https://jurnal.unprimdn.ac.id/index.php/Agriprimatech/article/view/760. Acesso em: 3 dec. 2025.