Zainal, Henni, Andi Ashar, Ignasius Setitit, M Aidil Aditya, and Septian Daruasin. 2020. “Performance of Land Ownership Certificate Service at the Land Office Agency in the Banggai Regency”. AMPERA JOURNAL 5 (2), 55-62. https://jurnal.uit.ac.id/ampera/article/view/1020.