Tin Duc Nguyen; Le Phuc Hai; Nguyen Le Thi Ngoc Chau. EXPLORING THE IMPLICIT IMPACT OF SUSTAINABILITY CERTIFICATIONS ON SERVICE QUALITY EXPECTATIONS: A NETNOGRAPHIC STUDY OF UPSCALE HOTELS IN HO CHI MINH CITY. HUIT_OJS 2026, 26 (3E), 2100. https://doi.org/10.62985/j.huit_ojs.vol26.no3E.620.