Where can I find a good cpa firm for audit and tax services?

[NPH]

I need to find a good cpa firm in Bay Area (San Francisco area), but I was unable to google it.

CPA firm employees: 10 to 50

Thank you in advance for helping me.

[BOB W]

http://www.google.com/search?q=cpa+san+francisco+ca&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7ADBR

[RLymanC]

Yellow pages

http://san_francisco-ca.yellowusa.co...tants_CPA.html

[NPH]

Thank you.

How many years should we change the auditor? We are a nonprofit real estate developer.