Dyana Karlina, et al. “Implementation Oof Tour Leader Operational Service System to Enhance Umrah Pilgrim Service Quality: A Case Study at PT. Wafdullah Tamu Mulia, Bengkulu Branch”. Jurnal Masharif Al-Syariah: Jurnal Ekonomi Dan Perbankan Syariah, vol. 11, no. 2, May 2026, doi:10.30651/jms.v11i3.31507.