Wallwork, A. (1997). Discussions A-Z advanced: A resource book of speaking activities. University of Cambridge.
Citace podle Chicago (17th ed.)Wallwork, Adrian. Discussions A-Z Advanced: A Resource Book of Speaking Activities. Cambridge: University of Cambridge, 1997.
Citace podle MLA (9th ed.)Wallwork, Adrian. Discussions A-Z Advanced: A Resource Book of Speaking Activities. University of Cambridge, 1997.
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