1.
Sitinjak TJR, Steffen E. THE EFFECT OF PRODUCT QUALITY AND SERVICE QUALITY ON CUSTOMER LOYALTY OF WARUNK UPNORMAL. J. Manaj. [Internet]. 2021 May 10 [cited 2024 Apr. 29];10(2):21-33. Available from: https://jurnal.kwikkiangie.ac.id/index.php/JM/article/view/740