- Author: Christine J. Ko Ronald J. Barr
- Language: English
- Year: 2016
- Author: Christine J. Ko Ronald J. Barr
- Language: English
- Year: 2017
- Author: Christine J. Ko Ronald J. Barr
- Language: English
- Year: 2011
- Author: Christine J. Ko Ronald J. Barr
- Language: English
- Year: 2008