Cita APA

Russel, F. A., & Beach, F. H. Test book of salesmanship (6th ed.). McGraw Hill bok company.

Citación estilo Chicago

Russel, Fredrick A., y Frank H. Beach. Test Book of Salesmanship. 6th ed. New York: McGraw Hill bok company.

Cita MLA

Russel, Fredrick A., y Frank H. Beach. Test Book of Salesmanship. 6th ed. McGraw Hill bok company.