...
See https://knowledge.exlibrisgroup.com/Alma/Product_Documentation/010Alma_Online_Help_(English)/030Fulfillment/060Courses_and_Reading_Lists/040Managing_Citations#Adding_a_Citation_Already_in_the_Repository for more details from Ex Libris.
When the citation already exists on the reading list: How to put an eJournal article on reserve for a class.
Locate the course reading list in Alma.
Locate the citation for the item(s) that the faculty member is asking for.
Add Non-Repository Citation - https://knowledge.exlibrisgroup.com/Alma/Product_Documentation/010Alma_Online_Help_(English)/030Fulfillment/060Courses_and_Reading_Lists/040Managing_Citations#Adding_a_Citation_Not_in_the_Repository_Without_Adding_it_to_the_Repository