崔建中. (2010). 哈伯德商业信条: Elbert Hubbard's business "credo". 北京理工大学出版社.
Lua i Stíl Chicago (17ú heag.)崔建中. 哈伯德商业信条: Elbert Hubbard's Business "Credo". 北京理工大学出版社, 2010.
Lua MLA (8ú heag.)崔建中. 哈伯德商业信条: Elbert Hubbard's Business "Credo". 北京理工大学出版社, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.