D'Aprix, R. (1982). Communicating for productivity. New York: Harper and Row.
Trích dẫn kiểu ChicagoD'Aprix, Roger. Communicating for Productivity. New York: Harper and Row, 1982.
Deismireacht MLAD'Aprix, Roger. Communicating for Productivity. New York: Harper and Row, 1982.
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