Who should I use for my job application references?

I'm sixteen and I'm filling out my first job application for Barnes and Noble. I had a summer job last year, but it was for my friend's dad and he just sorta hired me. I need three references (aside from my past job) and I'm not completely sure who to use. As it's summer, there is only one teacher I would be able to contact because I have her number from tennis. Would it be appropriate to use my best friend's mom? Any ideas of people in general it would be appropriate for me to use?