Whitby, N. (2006). Business benchmark: Pre-intermediate to intermediate, student's book (1a. ed.). Cambridge University.
Citace podle Chicago (17th ed.)Whitby, Norman. Business Benchmark: Pre-intermediate to Intermediate, Student's Book. 1a. ed. Cambridge: Cambridge University, 2006.
Citace podle MLA (9th ed.)Whitby, Norman. Business Benchmark: Pre-intermediate to Intermediate, Student's Book. 1a. ed. Cambridge University, 2006.
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