ROYANI, M.O. Investasi Sosial. Jurnal Penyuluhan, [S. l.], v. 2, n. 2, 2006. DOI: 10.25015/penyuluhan.v2i2.2134. Disponível em: https://journal.ipb.ac.id/jupe/article/view/2134. Acesso em: 23 dec. 2025.