Gregg Reference Manual by William A. Sabin
"The Gregg Reference Manual" is intended for anyone who writes, edits, or prepares final copy for distribution or publication. It presents the basic rules that apply in virtually every piece of writing, as well as the fine points that occur less often but cause no less trouble when they do. This manual offers an abundance of examples and computer-generated illustrations so that you can quickly find models on which to pattern a solution to the various problems you encounter in your communications - from e-mail messages to formal reports. It also provides the rationale underlying specific rules so that you can manipulate the principles of style with intelligence and taste.