Who should write my Peer Reference?

It may be easier to tell you who should NOT write it: a teacher, a coach, an employer, a parent/uncle/aunt/grandparent. The author of your peer reference should be, literally, a peer. Beyond that, there are no rules. It might be a friend from school, a team on which you play, a club to which you belong, from your neighborhood, from camp, from your community of faith, from a summer program you attended or an internship or job you have or had; it could even be a cousin or sibling. The specific nature of your connection to the author isn't as important as his/her ability to provide insight into your interests and your character. I hope this helps.