克里斯坦森. (2006). 直销致富: Make your first million in network marketing. 中国广播电视出版社.
Lua i Stíl Chicago (17ú heag.)克里斯坦森. 直销致富: Make Your First Million in Network Marketing. 中国广播电视出版社, 2006.
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Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.