HEPP, Marianne. German as a Foreign Language: Why Learning German is worthwhile in the World today. Glottodidactica, [S. l.], v. 40, n. 1, p. 19–31, 2013. DOI: 10.14746/gl.2013.40.1.2. Disponível em: https://pressto.amu.edu.pl/index.php/gl/article/view/365. Acesso em: 9 dec. 2025.