Michael Leclerc and Henry Hoff, editors,
Genealogical Writing in the 21st Century: A Guide to Register Style and More, 2nd ed. (Boston, Mass.: New England Historic Genealogical Society, 2006).
This handy 130 pp. book is one of my most used references. For an editorial review, see
Amazon.com (
http://www.amazon.com/Genealogical-Writing-21st-Century-Register/dp... : ....)