- Author: Organization for Economic Cooperation and Development
- Language: English
- Year: 2017
- Author: Organization for Economic Cooperation and Development
- Language: English
- Year: 2017
- Author: Organization for Economic Cooperation and Development
- Language: English
- Year: 2017
- Author: Chris Haroun
- Language: English
- Year: 2016
- Author: GMAC (Graduate Management Admission Council)
- Language: English
- Year: 2017
- Author: Chih-p’ing Chou Hua-Hui Wei Kun An Wei Wang
- Language: Chinese
- Year: 2011
- Author: Graham J. Williams
- Language: English
- Year: 2017
- Author: Mehdi Khosrow-Pour
- Language: English
- Year: 2017