Baer, J. (2013). Youtility: Why smart marketing is about help not hype. Portfolio/Penguin.
Chicagoスタイル(17版)引用形式Baer, Jay. Youtility: Why Smart Marketing Is About Help Not Hype. New York, New York: Portfolio/Penguin, 2013.
MLA(9版)引用形式Baer, Jay. Youtility: Why Smart Marketing Is About Help Not Hype. Portfolio/Penguin, 2013.
警告: この引用は必ずしも正確ではありません.