Godin, S. (1999). Permission marketing: Strangers into friends into customers. Simon & Schuster.
芝加哥风格引文Godin, Seth. Permission Marketing: Strangers into Friends into Customers. London: Simon & Schuster, 1999.
MLA引文Godin, Seth. Permission Marketing: Strangers into Friends into Customers. Simon & Schuster, 1999.
警告：这些引文格式不一定是100％准确.