BULILAN, Ramil S.; PONTE, Shaun James T. Oral Language Proficiency Level of International Business Process Outsourcing Agents. JPAIR Multidisciplinary Research, Philippines, v. 34, n. 1, p. 23–39, 2018. DOI: 10.7719/jpair.v34i1.627. Disponível em: https://philair.ph/index.php/jpair/article/view/627. Acesso em: 2 apr. 2025.