Livres comme The Natural Laws of Business
Autres livres de Richard Koch
80/20 Principle1998
The 80/20 Principle1999
The 80/20 Individual2003
El principio 80/202009
Simplify2016
The 80/20 Principle : The Secret of Achieving More with Less
80/20 Manager2015- Beyond the 80/20 PrincipleBeyond the 80/20 Principle2020
Living The 80/20 Way2005
Principio del 80/20, El (Paidos Empresa)1998
Star Principle, The2015- 80/20 Daily80/20 Daily2024