Canfield, B. R. (1958). Salesmanship; Practice and Problems (3rd ed.). McGraw-Hill.
シカゴスタイル引用形Canfield, Bertrand R. Salesmanship; Practice and Problems. 3rd ed. New York: McGraw-Hill, 1958.
MLA引用形式Canfield, Bertrand R. Salesmanship; Practice and Problems. 3rd ed. McGraw-Hill, 1958.
警告: この引用は必ずしも正確ではありません.