OKTAVIO, ADRIE, ENDO WIJAYA KARTIKA, ZEPLIN JIWA HUSADA TARIGAN, and THOMAS STEFANUS KAIHATU. 2021. “Covid-19 Pandemic And The Adversity Of Hotel Industry: Relationship Between Service Guarantees On Service Quality Perception And Consumer Perceived Risk”. The Journal of Contemporary Issues in Business and Government 27 (2):5313-20. https://cibgp.com/au/index.php/1323-6903/article/view/1433.