Jespersen, O. (1947). How to teach a foreign language: Translated from the Danish original by Sophia Yhlen-Olsen Bertelsen (1 ed., 8. repr.). Allen & Unwin.
Chicago-Zitierstil (17. Ausg.)Jespersen, Otto. How to Teach a Foreign Language: Translated from the Danish Original by Sophia Yhlen-Olsen Bertelsen. 1 ed., 8. repr. London: Allen & Unwin, 1947.
MLA-Zitierstil (9. Ausg.)Jespersen, Otto. How to Teach a Foreign Language: Translated from the Danish Original by Sophia Yhlen-Olsen Bertelsen. 1 ed., 8. repr. Allen & Unwin, 1947.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.