Dyfyniad APA

Frailey, L. E. (1942). How to write better business letters. American Technical Society.

Dyfyniad Arddull Chicago

Frailey, L. E. How to Write Better Business Letters. Chicago: American Technical Society, 1942.

Dyfyniad MLA

Frailey, L. E. How to Write Better Business Letters. American Technical Society, 1942.

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