Paryanti, Atik Budi, and Sumarsid Sumarsid. 2019. “Analysis The Quality Of Service And Effectiveness E-Commerce Auy Publisher Using The Method E-Servqual”. Agregat: Jurnal Ekonomi Dan Bisnis 3 (1):25-34. https://journal.uhamka.ac.id/index.php/agregat/article/view/3327.