First, apples and oranges. In addition the considerations you mention, the lesson manual is based on literary so it generally should not be consulted for formats. And I don't understand the relevance of the attribution. I really need to see this example. If this is a hypothetical, I can't help you much further than you've already helped yourself. Use the asterisk when it means an asterisk and not a reference indicator. It should be listed as special symbols. And again, the lesson manual is not appropriate for guidance about special symbols in a textbook.