EDITING AND STYLE

Topic Prentice Hall Reference Guide On-line Exercises
Commas

Commas 233-249

Essenstial and Nonessential Clauses and Phrases 239-241

Essential and Nonessential Elements

Serial Commas

Which Versus That

 

On-line Grammar and Style Resources

The Skidmore Guide To Writing
Guide to Grammar and Usage from Capital Community College
Punctuation Made Simple
Paradigm: On-line Writing Assistant from Boise State University.
Purdue University's On-line Writing Lab.
The Writer's Web, the University of Richmond's on-line reference center about grammar, style, and rhetoric.