Bender, J. F. (1961). How to sell well: Art and science of professional salesmanship. McGraw-Hill.
Styl ChicagoBender, James F. How to Sell Well: Art and Science of Professional Salesmanship. New York: McGraw-Hill, 1961.
Citace podle MLABender, James F. How to Sell Well: Art and Science of Professional Salesmanship. McGraw-Hill, 1961.
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