Alifah Nur Astari and Johan Alfian Pradama, “Building Sustainability of the Servqual Gap System with the 5 Dimensional Model of Physical Evidence”, jaita, vol. 5, no. 2, pp. 1–15, Dec. 2024, Accessed: Aug. 12, 2026. [Online]. Available: https://journal.uthm.edu.my/index.php/jaita/article/view/17349