Ben Goldstein, & Ben Goldstein; Maggie Baigent. (2011). English Unlimited. C1, Advanced self-study pack (workbook with DVD-ROM). Cambridge: Cambridge University Press.
Chicago-tyylinen lähdeviittausBen Goldstein, ja Ben Goldstein; Maggie Baigent. English Unlimited. C1, Advanced Self-study Pack (workbook With DVD-ROM). Cambridge: Cambridge University Press, 2011.
MLA-viiteBen Goldstein, ja Ben Goldstein; Maggie Baigent. English Unlimited. C1, Advanced Self-study Pack (workbook With DVD-ROM). Cambridge: Cambridge University Press, 2011.
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