Dyfyniad APA

Grant, D. (2005). Business focus: Elementary class cassette. Oxford: Oxford university press.

Dyfyniad Arddull Chicago

Grant, David. Business Focus: Elementary Class Cassette. Oxford: Oxford university press, 2005.

Dyfyniad MLA

Grant, David. Business Focus: Elementary Class Cassette. Oxford: Oxford university press, 2005.

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