Clementine Fitzria Sari and Adi Martono, “HARGA BATUBARA, NILAI TUKAR, DAN STRUKTUR MODAL TERHADAP HARGA SAHAM EMITEN BATUBARA INDONESIA: BUKTI KOINTEGRASI 2008–2024”, JAKPT, vol. 4, no. 1, pp. 629–651, Sep. 2026.