卡内基 & 刘双. (2010). 沟通的艺术: Quick and easy way to effective speaking. 天津社会科学院出版社.
Lua i Stíl Chicago (17ú heag.)卡内基 agus 刘双. 沟通的艺术: Quick and Easy Way to Effective Speaking. 天津社会科学院出版社, 2010.
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Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.