- Author: Michael Mitchell, David Covin
- Language: English
- Year: 2012
- Author: David Covin
- Language: English
- Year: 2017
- Author: Michael Mitchell, Nikol Alexander-Floyd, David Covin, Julia Jordan-Zachery
- Language: English
- Year: 2014
- Author: Michael Mitchell, David Covin
- Language: English
- Year: 2013
- Author: David Covin
- Language: English
- Year: 2009