Cassels, J. (1960). How to sell successfully by direct mail. Business publications.
Chicago Edition CitationCassels, J.W.W. How to Sell Successfully by Direct Mail. London: Business publications, 1960.
Cita MLACassels, J.W.W. How to Sell Successfully by Direct Mail. Business publications, 1960.
Atenció: Aquestes cites poden no estar 100% correctes.