Παραπομπή APA

Carl and Martens, P. (1962). Exercises in German Pronunciation. Max Hueber Verlag.

Παραπομπή Chicago Style

Carl and Martens, Peter. Exercises in German Pronunciation. Munchen: Max Hueber Verlag, 1962.

Παραπομπή MLA

Carl and Martens, Peter. Exercises in German Pronunciation. Max Hueber Verlag, 1962.