APA (7th ed.) Citation

Ek, J. A. v., & Alexander, L. G. (1980). Threshold level English: In a European unit/credit system for modern language learning by adults ([2d ed.].). Published for and on behalf of the Council of Europe by Pergamon Press.

Chicago Style (17th ed.) Citation

Ek, Jan Ate van, and L. G. Alexander. Threshold Level English: In a European Unit/credit System for Modern Language Learning by Adults. [2d ed.]. Oxford ; New York: Published for and on behalf of the Council of Europe by Pergamon Press, 1980.

MLA (9th ed.) Citation

Ek, Jan Ate van, and L. G. Alexander. Threshold Level English: In a European Unit/credit System for Modern Language Learning by Adults. [2d ed.]. Published for and on behalf of the Council of Europe by Pergamon Press, 1980.