执云 & 魏茂峰. (2009). 简单原本就是幸福: Happiness relies on simpleness. 光明日报出版社.
Dyfyniad Arddull Chicago执云 and 魏茂峰. 简单原本就是幸福: Happiness Relies on Simpleness. 光明日报出版社, 2009.
Dyfyniad MLA执云 and 魏茂峰. 简单原本就是幸福: Happiness Relies on Simpleness. 光明日报出版社, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.