what is the correct way to confront a co-worker about their behavior?

I want to let certain co-workers know they have treated me like **. However I am new, both are my preceptors and one to become one of my supervisors after graduating. I just want to be clear and honest and get the respect I deserve. However, I don't want to cause ';bad blood'; or create hostility since I am the new employee.I know as an African -American female they being caucasin will automatically see my being so blunt as aggressiveness and I don't want to come off as such and lose my job as I have seen many black women on my job lose their jobs for this specific reason when standing their ground but I have had enough! I physically hate coming to work, clock watch, and conteplate quitting daily but I have to pay the bills.