Van Ek, J., Fitzpatrick, M., Alexander, L., & Consejo de Europa. (1982). Waystage english: An intermediary objective below Threshold level in a european unit/credit system of modern language learning by adults. Oxford [etc.]: Pergamon press.

Van Ek, J.A, M.A Fitzpatrick, L.G Alexander, and Consejo de Europa. Waystage English: An Intermediary Objective Below Threshold Level in a European Unit/credit System of Modern Language Learning By Adults. Oxford [etc.]: Pergamon press, 1982.

Van Ek, J.A, M.A Fitzpatrick, L.G Alexander, and Consejo de Europa. Waystage English: An Intermediary Objective Below Threshold Level in a European Unit/credit System of Modern Language Learning By Adults. Oxford [etc.]: Pergamon press, 1982.