HODEL, Hans-Peter. Description and evaluation of language learning stays. Swiss Journal of Educational Research, Bern, v. 26, n. 3, p. 397–418, 2004. DOI: 10.24452/sjer.26.3.4686. Disponível em: https://sjer.ch/article/view/4686. Acesso em: 14 mar. 2025.