Ek, J. A. v. (1980). Threshold level English: In a European unit/credit system for modern language learning by adults ; prepared for the Council of Europe. Pergamon Press.
Chicago-Zitierstil (17. Ausg.)Ek, Jan Ate van. Threshold Level English: In a European Unit/credit System for Modern Language Learning by Adults ; Prepared for the Council of Europe. Oxford [u.a.]: Pergamon Press, 1980.
MLA-Zitierstil (9. Ausg.)Ek, Jan Ate van. Threshold Level English: In a European Unit/credit System for Modern Language Learning by Adults ; Prepared for the Council of Europe. Pergamon Press, 1980.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.