In our graduate school, a Ph.D. student has to present has a research proposal in form of a confirmation report. It is an internal document but contains a lot of material that is well-researched. Currently, as I am writing my research paper, is there any method, I can cite this report (like uploading over arXiv etc. ?). Also, is this method (of citing internal report) credible for reviewers of prestigious journals to accept such citations?
PS. This report is reviewed by our supervisors and a panel to judge our performance.