Citing Sources without Models in Chicago Style
To cite a source for which you cannot find a model, collect as much information as you can find—about the creator, title, date of creation or update, and location of the source—with the goal of helping your readers find the source for themselves, if possible. Then look at the models in this section to see which one most closely matches the type of source you are using.
In an academic writing project, before citing an electronic source for which you have no model, also be sure to ask your instructor’s advice.