Most employers expect students to use members of staff as referees.
Staff are normally happy to write references for students, as long as they are asked by the student first so that they can comment directly on why the student is interested in a particular career. Employers not only want to know how intelligent and literate you are, but nearly always want to know if you are reliable, self-motivated, able to take on board new ideas, good with people, capable of dealing with problems and able to produce work to deadlines. Seminars and tutorials are the obvious contexts in which you can develop these skills, so do make every effort to talk in the sessions to get the most out of the course.