NGKOLU, E. M.; PARANOAN, S.; INDRIASARI, R.; USMAN, E. Fluctuation in the Income of Rubber Farmers in Tingkea’o Village: The Contribution of Production Costs and Selling Price. Jurnal Ilmiah Global Education, [S. l.], v. 7, n. 1, p. 121–131, 2026. DOI: 10.55681/jige.v7i1.4948. Disponível em: https://ejournal.nusantaraglobal.ac.id/index.php/jige/article/view/4948. Acesso em: 2 apr. 2026.