Huynh, Tu, and Li Ly Hoang. “The Effects of Electronic Word of Mouth (eWOM), Persuasion Knowledge and Celebrity Endorsement in Advertisements Upon the Purchase Intention of Foreign Language Learners”. VNUHCM Journal of Economics, Law and Management 6, no. 4 (January 31, 2023): 3491-3503. Accessed June 7, 2025. http://stdjelm.scienceandtechnology.com.vn/index.php/stdjelm/article/view/1142.