Octavianto, S.N. et al. 2024. The Effect of Market Structure on Sales of Coal Companies Listed on the Indonesia Stock Exchange (IDX) for the Period 2018 - 2022. Ekuilibrium : Jurnal Ilmiah Bidang Ilmu Ekonomi. 19, 2 (Sep. 2024), 223–244. DOI:https://doi.org/10.24269/ekuilibrium.v19i2.2024.pp223-244.