Russel, F. A., & Beach, F. H. Test book of salesmanship (6th ed.). McGraw Hill bok company.
Citación estilo ChicagoRussel, Fredrick A., and Frank H. Beach. Test Book of Salesmanship. 6th ed. New York: McGraw Hill bok company.
Cita MLARussel, Fredrick A., and Frank H. Beach. Test Book of Salesmanship. 6th ed. McGraw Hill bok company.
Warning: These citations may not always be 100% accurate.