Barrera, R. (2005). Overpromise and overdeliver: The secrets of unshakable customer loyality. Penguin.
シカゴスタイル引用形Barrera, Rick. Overpromise and Overdeliver: The Secrets of Unshakable Customer Loyality. New Delhi: Penguin, 2005.
MLA引用形式Barrera, Rick. Overpromise and Overdeliver: The Secrets of Unshakable Customer Loyality. Penguin, 2005.
警告: この引用は必ずしも正確ではありません.