Dyfyniad APA
Levinson, N. S. (2000). How to sharpen your business writing skills (2nd ed.). American Management Association.
Dyfyniad Arddull Chicago
Levinson, Nan S. How to Sharpen Your Business Writing Skills. 2nd ed. [Saranac Lake, N.Y.]: American Management Association, 2000.
Dyfyniad MLA
Levinson, Nan S. How to Sharpen Your Business Writing Skills. 2nd ed. American Management Association, 2000.
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