Maulana, Alvito, and Sumiyati Sumiyati. 2026. “The Effect of Product Quality and Brand Image on Customer Loyalty in Purchasing Soy Sauce at PD Rusa Dua in Singkawang City”. Danadyaksa: Post Modern Economy Journal 4 (1):2207 – 2219. https://e-journal.bustanul-ulum.id/index.php/danadyaksa/article/view/451.