Siemers, Erik (January 6, 2010). "ClearEdge sustains brisk growth". Sustainable Business Oregon. American City Business Journals. Archived from the original on 16 July 2011. Retrieved 18 February 2010.
Siemers, Erik (January 6, 2010). "ClearEdge sustains brisk growth". Sustainable Business Oregon. American City Business Journals. Archived from the original on 16 July 2011. Retrieved 18 February 2010.