Hello! Welcome to the wiki!
the Module:Ref and Template:VERef pages work together to allow editors to make reference citations to TWI chapters easily. Module:Ref is a Lua module where I and other admins can input links to each chapter. An image showing the Cite button can be found here. A script that does this automatically for us everyday has been on my backburner for a while...
Documentation for Templates can be different per page, depending on who writes the documentation. I didn't add any documentation to either of those pages since they're just to support a background process and the only ones who have access are admins.