Title of dissertation/thesis (Doctoral dissertation). Building a foundation for evaluation of instruction in higher education and continuing education (Doctoral dissertation). For instance, I am aware that at least in Theoretical Physics, University of Bielefeld is an example of an institution where it is not mandatory to have the stuff written in the thesis published.
Can i cite a thesis paper
Format: Author, A (Year). Title of dissertation/thesis (Doctoral dissertation/Master's thesis). So that those count as more reliable sources (I dare say primary sources). Guide: How to cite a Dissertation in Harvard style. Name of Institution, Location.