MORROW, Jeffrey Stewart. Effect of English Ability on Income in Siem Reap, Cambodia Frontline Tourism Employees. International Journal of English and Education, [S. l.], v. 8, n. 1, p. 01–12, 2019. Disponível em: https://ijee.org/ijee/article/view/434. Acesso em: 6 nov. 2026.