Ramdan F. The Impact of Coal, Nickel, and Crude Oil Prices on the Composite Stock Price Index 2020-2023. jmef [Internet]. 2024 Sep. 25 [cited 2026 Apr. 19];2(5):242-8. Available from: http://jmef.polteksci.ac.id/index.php/jmef/article/view/57