References for doctoral dissertations and master's theses are divided by published and unpublished works. Unpublished works are generally retrieved directly from the institution in print form. Most theses are retrieved from databases (e.g., ProQuest Dissertations), university archive, or personal website.
Example (doctoral dissertation from an institutional database):
Hollander, M.M. (2017). Resistance to authority: Methodological innovations and new lessons from the Milgram
experiment (Publication No. 10289373) [Doctoral dissertation, University of Wisconsin-Madison]. ProQuest Dissertations and Theses Global.
Example (dissertation from the web - not a database):
Hutcheson, V.H. (2012). Dealing with dual differences: Social coping strategies of gifted and lesbian, gay,
bisexual, transgender, and queer adolescents [Master's thesis, The College of William & Mary]. William & Mary Digital Archive. https://digitalarchive.wm.edu/bitstream/handle/10288/16594/
HutchesonVirginia2012.pdf