Alexander, L. G. (1974). Developing skills: An integrated course for intermediate students (New Concept English). London: Longman.
Styl cytowania ChicagoAlexander, L. G. Developing Skills: An Integrated Course for Intermediate Students (New Concept English). London: Longman, 1974.
Styl cytowania MLAAlexander, L. G. Developing Skills: An Integrated Course for Intermediate Students (New Concept English). London: Longman, 1974.
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