Out-of-Group or In-Group E-WOM affects Consumer Purchasing Decision? Yunita Wijaya Handranata, Maria Grace Herlina, Ekacitta Liman Tanaya and Renaldy Setiawan E3S Web Conf., 426 (2023) 02117 Published online: 15 September 2023 DOI: 10.1051/e3sconf/202342602117