Choy Pun, A.C. et al. 2026. Quality Management System (ISO 9001:2015) to Improve Customer Satisfaction in a Beauty Salon: Evidence from Montalvo Salon & Spa - San Miguel. LACCEI. 1, 14 (July 2026). DOI:https://doi.org/10.18687/LACCEI2026.1.1.238.