Dyfyniad APA

Buckley, E. A. (1957). How to write better business letters/4e (4th ed.). McGraw Hill.

Dyfyniad Arddull Chicago

Buckley, Earl A. How to Write Better Business Letters/4e. 4th ed. New York: McGraw Hill, 1957.

Dyfyniad MLA

Buckley, Earl A. How to Write Better Business Letters/4e. 4th ed. McGraw Hill, 1957.

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