- Clark, Jessica. Marketing liaison, Cool Roof Rating Council. Personal interview. April 22, 2011.
- Cool Roof Rating Council Web site. (April 29, 2011)http://www.coolroofs.org
- Ludowici Roof Tile. "Ludowici is leading the way in the Green movement for roofing." (April 26, 2011)http://www.ludowici.com/color_choice/go_green
- NAHB Research Center. "Residential Green Roof Systems." (April 28, 2011)http://www.toolbase.org/Technology-Inventory/Roofs/green-roofs