Parulian, P., and M. Budiman. “THE EFFECT OF PERCEIVED OF USEFULNESS, EASY TO USE, EXPERIENCE TO ATTITUDE USER GOJEK ON GOPAY”. Jurnal Ekonomi, vol. 12, no. 01, Jan. 2023, pp. 121-4, https://ejournal.seaninstitute.or.id/index.php/Ekonomi/article/view/1110.