I am working on a document in InDesign and on the last page I have a list of sources. After each text section I need to add a number pointing to the relevant source on my list. Is it possible to do this in a way that allows me to add and remove numbers as go along?
Just noticed you said "at the end"
InDesign has no function for end notes.
You could do it using Cross-References http://helpx.adobe.com/indesign/using/cross-references.html
But that's a lot more trouble than it's worth.
I would still go with the Footnotes option when initially laying out your file and you can use this script to convert all your footnotes to endnotes- http://www.kahrel.plus.com/indesign/foot_to_endnote.html