Richard Koch

Books
The 80/20 Principle The 80/20 Principle
The 80/20 Principle
2022
Unreasonable Success and How to Achieve It Unreasonable Success and How to Achieve It
Unreasonable Success and How to Achieve It
2020
The 80/20 Manager The 80/20 Manager
The 80/20 Manager
2026
80/20 Sales and Marketing 80/20 Sales and Marketing
80/20 Sales and Marketing
2013
O Princípio 80/20 O Princípio 80/20
O Princípio 80/20
2026
80 : 20 na každý deň 80 : 20 na každý deň
80 : 20 na každý deň
2025