Mahmuddin R, Liong H, Liong NF. The Effect of Direct Marketing and Product Quality on Competitive Advantage at PT. Fausan Water Filterindo. POVREMA [Internet]. 2025Jun.1 [cited 2026Jun.26];6(3):1-. Available from: http://journal.accountingpointofview.id/index.php/POVREMA/article/view/370