WALKER, E; ELSWORTH, S. 2005. Grammar practice for upper intermediate students: With key. 6th impression 1st ed. Harlow, Essex: Longman/Pearson Education Limited.
Citace podle APA (7th ed.)Walker, E., & Elsworth, S. (2005). Grammar practice for upper intermediate students: With key (6th impression 1st ed.). Longman/Pearson Education Limited.
Citace podle Chicago (17th ed.)Walker, Elaine, a Steve Elsworth. Grammar Practice for Upper Intermediate Students: With Key. 6th impression 1st ed. Harlow, Essex: Longman/Pearson Education Limited, 2005.
Citace podle MLA (9th ed.)Walker, Elaine, a Steve Elsworth. Grammar Practice for Upper Intermediate Students: With Key. 6th impression 1st ed. Longman/Pearson Education Limited, 2005.
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