Canfield, B. R. (1958). Salesmanship; Practice and Problems (3rd ed.). McGraw-Hill.
Chicago ZitierstilCanfield, Bertrand R. Salesmanship; Practice and Problems. 3rd ed. New York: McGraw-Hill, 1958.
MLA ZitierstilCanfield, Bertrand R. Salesmanship; Practice and Problems. 3rd ed. McGraw-Hill, 1958.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.