Monica Puspadewi Widyastuti, Yohan Wismantoro. The Effect of Perceived Usefulness, Brand Image, and Promotion on Gopay E-Wallet User Loyalty in Semarang City. ICEAT [Internet]. 2025 Nov. 7 [cited 2025 Nov. 18];2(2):60-7. Available from: https://prosiding.areai.or.id/index.php/ICEAT/article/view/149