Andry JF, Christianto K, Wilujeng FR. Using Webqual 4.0 and Importance Performance Analysis to Evaluate E-Commerce Website. J. Inf. Syst. Eng. Bus. Intell. [Internet]. 2019 Apr. 25 [cited 2025 Apr. 5];5(1):23-31. Available from: https://e-journal.unair.ac.id/JISEBI/article/view/9671