“The Influence of Service Quality, Brand Image, and Product Innovation on Guitar Customer Loyalty at PT Genta Tri Karya ”. Journal of Economicate Studies 4, no. 2 (December 3, 2020): 98–107. Accessed October 20, 2026. https://www.journal.islamicateinstitute.co.id/index.php/joes/article/view/652.