Dale Carnegie & Associates. (2003). The Sales Advantage. Free Press.
Chicagoスタイル(17版)引用形式Dale Carnegie & Associates. The Sales Advantage. New York ; London: Free Press, 2003.
MLA(9版)引用形式Dale Carnegie & Associates. The Sales Advantage. Free Press, 2003.
警告: この引用は必ずしも正確ではありません.