Παραπομπή APA

Bender, J. F. (1961). How to sell well: Art and science of professional salesmanship. McGraw-Hill.

Παραπομπή Chicago Style

Bender, James F. How to Sell Well: Art and Science of Professional Salesmanship. New York: McGraw-Hill, 1961.

Παραπομπή MLA

Bender, James F. How to Sell Well: Art and Science of Professional Salesmanship. McGraw-Hill, 1961.