Tin Duc Nguyen, et al. “EXPLORING THE IMPLICIT IMPACT OF SUSTAINABILITY CERTIFICATIONS ON SERVICE QUALITY EXPECTATIONS: A NETNOGRAPHIC STUDY OF UPSCALE HOTELS IN HO CHI MINH CITY”. HUIT Journal of Science, vol. 26, no. 3E, Aug. 2026, p. 2100, https://doi.org/10.62985/j.huit_ojs.vol26.no3E.620.