I’m no expert but I don’t think this is doable as I don’t think Coda actually support referencing other docs.
But what you could possibly do, is put everything in one doc and grouping things by folders and sections :
- Folder A : everything that concerns the sections of the doc A and the table A
- Folder B : everything that concerns the sections of the doc B and the table B
- Folder C : The table C with the info gathered from table A and Table B
Or maybe in doc C, duplicate the tables A and B (Copy/Paste) and keep them in sync with the original table by using Zapier as suggested in this post ?