- Author: Editors of Green Guide
- Language: English
- Year: 2008
- Author: Berté Rodrigo
- Language: Portuguese
- Year: 2009
- Author: Litfin Karen T
- Language: English
- Year: 2015
- Author: Litfin Karen T
- Language: English
- Year: 2015
- Author: Challenger Melanie
- Language: English
- Year: 2012
- Author: John C. Ayers
- Language: English
- Year: 2017