Nazifa Hafiza et al. 2025. 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, 12 (Sep. 2025), 3173–3181. DOI:https://doi.org/10.54443/ijset.v4i12.1118.