One of my writer friends recently asked me what the punctuation rules were for various circumstances. I had to tell her that she probably wouldn't like my answer, but there were no rules; there were only suggestions.
If somebody uses a particular style guide, the answer is in those pages. If there are no requirements, then style is your playground. You're the writer; do whatever you please. The only rule you have to follow is to be consistent.
No matter how you like to write things, as long as you pick a style that's legible and you stick with that style, you'll be doing just fine.