Baer, J. (2013). Youtility: Why smart marketing is about help not hype. Portfolio/Penguin.
芝加哥风格引文Baer, Jay. Youtility: Why Smart Marketing Is About Help Not Hype. New York, New York: Portfolio/Penguin, 2013.
MLA引文Baer, Jay. Youtility: Why Smart Marketing Is About Help Not Hype. Portfolio/Penguin, 2013.
警告：这些引文格式不一定是100％准确.