Swan, M. (1978). Spectrum: An anthology of english varieties for intermediate and more advanced students (1a. ed.). Cambridge University.
Citace podle Chicago (17th ed.)Swan, Michael. Spectrum: An Anthology of English Varieties for Intermediate and More Advanced Students. 1a. ed. Cambridge: Cambridge University, 1978.
Citace podle MLA (9th ed.)Swan, Michael. Spectrum: An Anthology of English Varieties for Intermediate and More Advanced Students. 1a. ed. Cambridge University, 1978.
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