Dyfyniad APA

Evans D. David. (2004). Powerhouse. An Upper Intermediate Business English course. Harlow, Longman, 2004.

Dyfyniad Arddull Chicago

Evans D. David. Powerhouse. An Upper Intermediate Business English Course. Harlow, Longman, 2004, 2004.

Dyfyniad MLA

Evans D. David. Powerhouse. An Upper Intermediate Business English Course. Harlow, Longman, 2004, 2004.

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