Dyana Karlina, Khairiah Elwardah, Evan Stiawan. Implementation Oof Tour Leader Operational Service System to Enhance Umrah Pilgrim Service Quality: A Case Study at PT. Wafdullah Tamu Mulia, Bengkulu Branch. JMS [Internet]. 2026 May 6 [cited 2026 Nov. 7];11(2). Available from: https://journal.um-surabaya.ac.id/Mas/article/view/31507