Alexander, L. (1991). New Concept English: Practice and Progress. London: Longman.
Trích dẫn kiểu ChicagoAlexander, L.G. New Concept English: Practice and Progress. London: Longman, 1991.
MLA citiranjeAlexander, L.G. New Concept English: Practice and Progress. London: Longman, 1991.
Opozorilo: Ti citati niso vedno 100% točni.