Here are some guides that contain virtually everything a proofreader needs to know about punctuation and its many rules and irregularities.
These books won’t always give definitive answers (punctuation is often subjective and down to style, after all) but they are useful if you want to build an awareness of punctuation rules, and use this to give good advice to your clients.
- Penguin Guide to Punctuation, by R L Trask, Penguin, 2004
- The Best Punctuation Book, Period, by June Casagrande, Ten Speed Press, 2014
Online Punctuation Guides
See more from the category
Business Writing Style Sheet
Academic Writing Style Sheet
Non-fiction Style Sheet
Fiction Style Sheet
This is specifically concerned with terms you might come across when proofreading creative writing, or when working within the publishing industry.