WARDANI, L. K.; BUDIWITJAKSONO, G. S. ANALISIS PROFITABILITAS DAN LEVERAGE TERHADAP RETURN SAHAM PADA SEKTOR PERTAMBANGAN BATU BARA. Jurnal Proaksi, [S. l.], v. 8, n. 2, p. 313–321, 2021. DOI: 10.32534/jpk.v8i2.1843. Disponível em: https://e-journal.umc.ac.id/index.php/JPK/article/view/1843. Acesso em: 23 feb. 2025.