Reiwines, Reiwines, and Ferry Hidayat. “Analysis of Service Quality and Product Quality on Customer Purchase Decisions in CV. Surya Indah Jaya Medan With Price As a Variable Intervention”. Jurnal Mantik 5, no. 4 (January 12, 2022): 2156-2164. Accessed August 24, 2026. https://www.ejournal.iocscience.org/index.php/mantik/article/view/1921.