Hi @Mark_Dean, I have formatted the code in your post. you can press the 
pencil icon at the top to see the changes (select “Raw” to see what I actually wrote in the post’s text field). Making your post more readable using the tips @gezepi provided (code formatting, clearly state questions, following the guidelines) usually helps with engagement. Apart from that I want to mention that stating what errors your code produces also helps.
You’d have to check, but maybe my package Alexandria can help here: it lets you get a list of references before rendering it, maybe you can use that to underline some entries (although I’m honestly not sure about it).
Finally, if you feel the response you got has sufficiently answered your question, be sure to give it a checkmark 
. This will help others find the solution in the future. Thanks!