卡内基 & 刘双. (2010). 人性的优点: How to stop worrying and start living. 天津社会科学院出版社.
Dyfyniad Arddull Chicago卡内基 and 刘双. 人性的优点: How to Stop Worrying and Start Living. 天津社会科学院出版社, 2010.
Dyfyniad MLA卡内基 and 刘双. 人性的优点: How to Stop Worrying and Start Living. 天津社会科学院出版社, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.