1. Kementerian Energi dan Sumber Daya Mineral, www.esdm.go.id, Last Accessed 10 January 2021.
2. Bursa Efek Indonesia: Laporan Keuangan & Tahunan, www.idx.co.id., Last Accessed 7 February 2020.
3. Ang James S., Beck Kristine L.: A Comparison of Marginal and Average Tobin's Q Ratios. International Journal of Business, 5(1), (2000).
4. Bank Indonesia. Laporan Pemetaan Sektor Ekonomi (Sektor Pertambangan), www.bi.go.id, Last Accessed 10 January 2021.
5. Kumar, S.: New evidence on stock market reaction to dividend announcements in India. Research in International Business and Finance 39, 327-337 (2017).