A Learning Support on Using a Comma to Indicate Direct Address

Here is a learning support on using a comma to indicate direct address. This is the sixth of a total of fifteen of these documents on commas. (You can find an excursus on this choice of publishing practice here.)

If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.