Kerr, P. (2005). Straightforward: Pre-intermediate. Student's book (1a. ed.). Macmillan Education.
Citace podle Chicago (17th ed.)Kerr, Philip. Straightforward: Pre-intermediate. Student's Book. 1a. ed. Oxford: Macmillan Education, 2005.
Citace podle MLA (9th ed.)Kerr, Philip. Straightforward: Pre-intermediate. Student's Book. 1a. ed. Macmillan Education, 2005.
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