O'SULLIVAN, D; SWAN, M; WALTER, C. 1993. The New Cambridge English Course: Practice 4 + Key Upper-Intermediate. Cambridge: Cambridge University Press.
Citace podle APA (7th ed.)O'Sullivan, D., Swan, M., & Walter, C. (1993). The New Cambridge English Course: Practice 4 + Key Upper-Intermediate. Cambridge University Press.
Citace podle Chicago (17th ed.)O'Sullivan, Desmond, Michael Swan, a Catherine Walter. The New Cambridge English Course: Practice 4 + Key Upper-Intermediate. Cambridge: Cambridge University Press, 1993.
Citace podle MLA (9th ed.)O'Sullivan, Desmond, et al. The New Cambridge English Course: Practice 4 + Key Upper-Intermediate. Cambridge University Press, 1993.
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