LIETZ, Gero. Ursula Hirschfeld, Kerstin Reineke, Eberhard Stock (eds.): Phonothek intensiv. Aussprachetraining. Studia Germanica Posnaniensia, [S. l.], n. 31, p. 180–182, 2008. DOI: 10.14746/sgp.2008.31.18. Disponível em: https://pressto.amu.edu.pl/index.php/sgp/article/view/2644. Acesso em: 18 maj. 2024.