- Author: Lawrence C. Karlson
- Language: English
- Year: 2015
- Author: M.L. Jhingan
- Language: English
- Year: 2014
- Author: Kathryn James
- Language: English
- Year: 2015
- Author: Sam Delaney
- Language: English
- Year: 2015
- Author: Robert J. Barro Jong-Wha Lee
- Language: English
- Year: 2015