APA-Zitierstil (7. Ausg.)

Ek, J. A. v. (1977). The threshold level in a European language learning system. Council of Europe, Comm. for Out-of-School Educ. and Cult. Developm.

Chicago-Zitierstil (17. Ausg.)

Ek, Jan Ate van. The Threshold Level in a European Language Learning System. Strasbourg: Council of Europe, Comm. for Out-of-School Educ. and Cult. Developm, 1977.

MLA-Zitierstil (9. Ausg.)

Ek, Jan Ate van. The Threshold Level in a European Language Learning System. Council of Europe, Comm. for Out-of-School Educ. and Cult. Developm, 1977.