Nazifa Hafiza, T. Edyansyah, Chalirafi, Heriyana. THE INFLUENCE OF WORD OF MOUTH, PRODUCT QUALITY AND SALES PROMOTION ON THE PURCHASE DECISION OF BRAND SHAMPOO PRODUCTS HEAD & SHOULDERS BY THE COMMUNITY IN JEUMPA DISTRICT REGENCY BUREAUCRACY. IJSET [Internet]. 2025 Sep. 20 [cited 2026 Apr. 26];4(12):3173-81. Available from: https://ijset.org/index.php/ijset/article/view/1118