Hastuti FT. THE EFFECT OF SERQUAL, BRAND IMAGE, AND CUSTOMER VALUE ON CUSTOMER LOYALTY TUTORING AGENCY GROUPS IN EAST SURABAYA. ICOBUSS [Internet]. 2025June17 [cited 2026Aug.25];1(1). Available from: https://ojsicobuss.stiesia.ac.id/index.php/icobuss1st/article/view/43