Amelia fitri, Fikriyah K. Hubungan Promo Cashback Terhadap Loyalitas Pelanggan Muslim Surabaya Dalam Pelayanan Digital Wallet Ovo. JEKoBi [Internet]. 2020Aug.1 [cited 2024May6];3(2):108-15. Available from: https://journal.unesa.ac.id/index.php/jei/article/view/9010