Zuhra Mayana S, Nurhayati S. Legal Protection of Consumers for Cashless Payment at Coffeeshop ( Study at Common Folks Medan ). ICEEGLOF [Internet]. 2025 Jun. 11 [cited 2025 Dec. 15];:508-14. Available from: https://proceeding.pancabudi.ac.id/index.php/ICEEGLOF/article/view/368