Nazifa Hafiza, T. Edyansyah, Chalirafi, and 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”. International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET) 4, no. 12 (September 20, 2025): 3173–3181. Accessed April 26, 2026. https://ijset.org/index.php/ijset/article/view/1118.