Zeta Novia Ramadhan, et al. “ANALISIS SENSITIVITAS USAHATANI KARET (HEVEA BRASILIENSIS. MUELL. ARG) RAKYAT DI KECAMATAN GALANG KABUPATEN DELI SERDANG”. Jurnal Cakrawala Ilmiah, vol. 3, no. 4, Dec. 2023, pp. 901-10, https://bajangjournal.com/index.php/JCI/article/view/7008.