Dyfyniad APA

Cassles, J. W. W. (1960). How to sell successfully by direct mail (IV.).

Dyfyniad Arddull Chicago

Cassles, J W W. How to Sell Successfully by Direct Mail. IV. :, 1960.

Dyfyniad MLA

Cassles, J W W. How to Sell Successfully by Direct Mail. IV. 1960.

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