Octavianto, Said Nur, Amin Pujiati, and Sucihatiningsih Dian Wisika Prajanti. 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):223-44. https://doi.org/10.24269/ekuilibrium.v19i2.2024.pp223-244.