80/20 Sales and Marketing: The Definitive Guide to Working Less and Making More Book by Perry Marshallpremium off white cream pages Stitched binding Matte cover local premium copy Language English Dimensions 5. 5 x 8. 26 inches Page amount 272 Summary: 80 20 Sales and Marketing: The Definitive Guide to Working Less and Making More by Perry Marshall is a business and marketing guide that applies the 80 20 principle (the Pareto Principle) to optimize sales and productivity. Marshall explains how 80% of results come from 20% of efforts, and he teaches