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.
Dyfyniad Arddull Chicago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.
Dyfyniad MLA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.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.