Blackman Jeff. (2003). Stop Whining! Start Selling!: Profit-Producing Strategies for Explosive Sales Results. American: Wiley.
シカゴスタイル引用形Blackman Jeff. Stop Whining! Start Selling!: Profit-Producing Strategies for Explosive Sales Results. American: Wiley, 2003.
MLA引用形式Blackman Jeff. Stop Whining! Start Selling!: Profit-Producing Strategies for Explosive Sales Results. American: Wiley, 2003.
警告: この引用は必ずしも正確ではありません.