Hafida Nuarisa, R., and S. . Nanta Setia Dien Labolo. “The Relevance of Money Function to Digital Money (Cryptocurrency) On The Abu Ubaid Perspective in Kitab Al-Amwaal”. Journal of Comprehensive Science (JCS), vol. 3, no. 5, May 2024, doi:10.59188/jcs.v3i5.697.