Ek, J. A. v., & Ek, J. A. v. (1980). Threshold level English: In a European unit / credit system for modern language learning by adult. Oxford: Pergamon.
Chicago Style CitationEk, Jan Ate van, and Jan Ate van Ek. Threshold Level English: In a European Unit / Credit System for Modern Language Learning By Adult. Oxford: Pergamon, 1980.
MLA CitationEk, Jan Ate van, and Jan Ate van Ek. Threshold Level English: In a European Unit / Credit System for Modern Language Learning By Adult. Oxford: Pergamon, 1980.
Warning: These citations may not always be 100% accurate.