Agustiyar, Fandika. “Indications of the Potential of Shale Gas for Non-Conventional Energy Sources in Indonesia”. Tadulako Science and Technology Journal 2, no. 1 (August 12, 2021): 17-25. Accessed September 15, 2024. https://bestjournal.untad.ac.id/index.php/sciencetech/article/view/15553.