FATHIRA, Riri Lidya; PERMANA, Irfan Satria; OSWARA, Randy M. Analisis Kelayakan Investasi Pada Pertambangan Batubara PT. XYZ Kecamatan XYZ Kabupaten Indragiri Hilir Provinsi Riau. Innovative: Journal Of Social Science Research, [S. l.], v. 4, n. 4, p. 3569–3580, 2024. DOI: 10.31004/innovative.v4i4.13497. Disponível em: https://j-innovative.org/index.php/Innovative/article/view/13497. Acesso em: 3 may. 2026.