Thanks for the kind words. The only wisdom I have at the moment is to note that I see this same question posted a minute before this one. I'm responding to this one and I will delete the earlier one. I had seen no previous messages about this.
Source citations and attributes are both covered IN Displayed Materials and there is no mention of anything other than a 7-5 margin for source citations. But note that what comes after displayed material is usually an ATTRIBUTION and those are blocked in the fifth cell to the right of the preceding line. It is source citations that are in 7-5. Determine whether you have an attribution or a source citation. See 9.4 and 9.5.