Alikaputri, Fiona Rahmi. “Improving The Quality Of Eye Care Services Using The Servqual Method, Importance–Performance Analysis, And The 5 Whys Analysis (Case Study: Abc Eye Clinic)”. Eduvest - Journal of Universal Studies 6, no. 6 (June 17, 2026): 7232–7247. Accessed June 17, 2026. https://eduvest.greenvest.co.id/index.php/edv/article/view/53235.