Link to different modules and sections within a learning plan

I would love to be able to add a link in a learning plan to another section within another module in the same learning plan (like in a document you can add a hyperlink to quickly go to another section or on a webpage add a link to somewhere on the same page). I want to add a link in one module to a section in a previous module in the same learning plan (in case they cant remember if they have done this already...or need to refer back to previous instructions to save repeating them).