San Francisco Chronicle - May 20, 2007

Excerpt:

"Within five years, 10 percent of small and medium business advertisers will be do-it-yourself pay per click," said Internet expert Greg Sterling of Sterling Market Intelligence. "Anecdotally, it's clear to me that more small businesses are trying to pursue online marketing, and paid search is a subset of that."

From the article, "Narrowing Online Market Focus", by Ilana DeBare, San Francisco Chronicle, May 20, 2007