Alexander, L. G. (1976). Developing skills: An integrated course for intermediate students. Longman.
Citace podle Chicago (17th ed.)Alexander, Louis George. Developing Skills: An Integrated Course for Intermediate Students. Londres: Longman, 1976.
Citace podle MLA (9th ed.)Alexander, Louis George. Developing Skills: An Integrated Course for Intermediate Students. Longman, 1976.
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