1.
Jeffrey J, Situmeang RR, Christopher C. The Effect Of Product Quality, Responsiveness and Promotion on Customer Satisfaction at PT. Global Graha Sarana Abadi. Mantik [Internet]. 2021Aug.30 [cited 2026Jul.7];5(2):1313-20. Available from: https://iocscience.org/ejournal/index.php/mantik/article/view/1532