Khamis, M. R., and M. F. bin Kamarudin. “The Economic Theory Assumption and Utility Maximization Model: The Perspective of Zakat Compliance Behavior”. Information Management and Business Review, Vol. 15, no. 2(I)SI, June 2023, pp. 17-34, doi:10.22610/imbr.v15i2(I)SI.3415.