Akbar, W., & Frasetia, A. (2023). Concepts and Implementation in Multiple Business Systems: Study in Village Unit Cooperatives, Pangkalan Tiga, Central Kalimantan. Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE), 7(1), 462-480. https://doi.org/10.31538/iijse.v7i1.3221