(美)哈利·贝克威斯著. (2013). 畅销的秘密：非理性的神奇力量：the surprising forces behind what we buy. 南方出版社.
Dyfyniad Arddull Chicago(美)哈利·贝克威斯著. 畅销的秘密：非理性的神奇力量：the Surprising Forces Behind What We Buy. 南方出版社, 2013.
Dyfyniad MLA(美)哈利·贝克威斯著. 畅销的秘密：非理性的神奇力量：the Surprising Forces Behind What We Buy. 南方出版社, 2013.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.