Using That and Which Correctly, Better Writing Skills, Writing Resources From Scribe Consulting
An easy-to-understand example of the difference between “that” and “which” and why, in legal and business writing, it is important to use each correctly. It also provides an excellent example of how grammar and punctuation mistakes can dramatically change the meaning of your document. -CCE
For more writing tips on common grammar errors, go to http://www.betterwritingskills.com/writing-tips.html.