Some sources just don't fit easily into a category. See below for examples of varied source types.
(American Medical Association, 2016)
American Medical Association. (2016). AMA code of medical ethics. https://www.ama-assn.org/delivering-care/ethics/code-medical-ethics-overview
Carolan, K. (2017). Assessment of the impact of a digital intervention on public attitudes to vaccination (Publication No. 3544643) [Doctoral Dissertation, Manchester Metropolitan University]. EBSCO Open Dissertations.
Walsey, K. E. (2019). Uncovering the mystery: An application of XRF on possible comingled remains [Unpublished master’s thesis]. Ball State University.