Többnyelvű Európa: Kenner, Charmian – Hickey, Tina (szerk.) (2008): Multilingual Europe: Diversity and Learning. Trentham Books, Stoke on Trent, 198 p. Training and Practice : Journal of Educational Sciences, [S. l.], v. 11, n. 1-4, p. 197–202, 2013. Disponível em: https://journal.uni-mate.hu/index.php/trainingandpractice/article/view/5134. Acesso em: 30 jan. 2026.