Ernest, J. W., & Ashmun, R. D. (1973). Salesmanship Fundamentals (4th ed.). McGraw-Hill.
シカゴスタイル引用形Ernest, John W., , Richard D. Ashmun. Salesmanship Fundamentals. 4th ed. New York: McGraw-Hill, 1973.
MLA引用形式Ernest, John W., , Richard D. Ashmun. Salesmanship Fundamentals. 4th ed. McGraw-Hill, 1973.
警告: この引用は必ずしも正確ではありません.