- Author: Kristof Nicholas D., WuDunn Sheryl
- Language: English
- Year: 2009
- Author: Kristof Nicholas D., WuDunn Sheryl
- Language: English
- Year: 2009
- Author: Kristof Nicholas D., WuDunn Sheryl
- Language: English
- Year: 2009
- Author: Kristof Nicholas D., WuDunn Sheryl
- Language: English
- Year: 2009