I am in the early stages of thinking how to structure and write my dissertation. In the course of doing so, I have been spending a lot of time reviewing unpublished dissertations via my universities library service.
One thing I have noticed is that many dissertations include intricate high quality figures but with no reference or sources cited in the figure caption. Should I assume the author somehow generated the figure themselves? Or is it more likely or common that the figure was taken from some other source (e.g. a textbook) and it wasn’t cited because that is not customary or necessary since the work was unpublished?
My gut feel is that any figure you did not create yourself should have a source or reference attached to it.