Desha, C., Hargroves, K. C., Smith, M. H., Stasinopoulos, P., & Weizsacker, E. V. (2009). Factor Five, Transforming the global economy through 80 % improvements in resource productivity.

Desha, Cheryl, Karlson Charlie Hargroves, Michael H. Smith, Peter Stasinopoulos, và Ernst Von Weizsacker. Factor Five, Transforming the Global Economy Through 80 % Improvements in Resource Productivity. London, Earth Scan, 2009.

Desha, Cheryl, et al. Factor Five, Transforming the Global Economy Through 80 % Improvements in Resource Productivity. 2009.