I'm a Masters student and looking for an internship. During my bachelor studies I performed two internships, both of which I can use my supervisors as reference. However, the first internship is now four years ago, the second is 2 years ago. Are these still relevant, or should I remove references from my CV after X years?
If the reference isn't too old, is there a max amount of references you should add to a CV? Besides these two references I got a reference from a professor from my bachelor studies and one from my Master studies, but I don't know if putting four references up is too much, or if I should put up the most relevant one.