2021. Analisis Ekonomis Sewa atau Beli Alat Excavator pada Kegiatan Produksi Bijih Timah PT Prima Timah Utama, Desa Cit, Kabupaten Bangka: Economic Analysis of Rent or Buy Excavator for Tin Production at PT Prima Timah Utama, Cit Village, Bangka Regency. MINERAL. 6, 2 (Oct. 2021), 13–17. DOI:https://doi.org/10.33019/mineral.v6i2.3088.