Hameed Shukur Abdul Ameer Al-Azzawi et al. 2025. The Role of Employee Knowledge, Providers, Environment, and Processes in Service Differentiation Strategy: A Study on a Sample of Service Institutions in Baghdad . Jurnal Pajak dan Analisis Ekonomi Syariah. 2, 3 (Jul. 2025), 211–229. DOI:https://doi.org/10.61132/jpaes.v2i3.1300.