Qolbi, G. N. ., Gunawan, B. ., & Sugandi, Y. S. . (2023). ALTERNATIF KEBIJAKAN UNTUK FLY ASH AND BOTTOM ASH (STUDI KASUS: PP NO. 22 TAHUN 2021). SCIENTIFIC JOURNAL OF REFLECTION : Economic, Accounting, Management and Business, 6(3), 502-512. https://doi.org/10.37481/sjr.v6i3.691