Dyfyniad APA

Hart, G. (1997). 30 minutes - to succeed in business writing. Kogan Page.

Dyfyniad Arddull Chicago

Hart, Graham. 30 Minutes - to Succeed in Business Writing. New Delhi: Kogan Page, 1997.

Dyfyniad MLA

Hart, Graham. 30 Minutes - to Succeed in Business Writing. Kogan Page, 1997.

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