Ah, a misunderstanding: this is a moderation question, not a formatting question - I know how to format quotes.
What I am questioning is that a post I have written incorporating a quote from another poster - and that I have seen successfully submitted and displayed on the thread, (so the formatting was correct) - is edited a few hours or a day later by the moderator?, who removes the quote box and leaves just the name of the quotee.
This has now happened a few times. Unfortunately I cannot provide examples because I did not copy the original posts. The post initially displays with the quote box but is later seen to have had just the quote box removed. Could this be some sort of glitch rather than moderation?