We recommend several writing resources for purchase:

The Gregg Reference Manual, 11th Ed. 

            Editor: William A. Sabin 
            Publisher: McGraw-Hill Companies
            Published: 2011

            The staff at Belisle & Associates was among the business
            writing professionals selected to help edit the 9th, 10th, and 11th
            editions of this manual.

Write Right!, 4th Ed. 

            Author: Jan Venolia 
            Publisher: Ten Speed Press
            Published: 2001