How do I cite a source with no date in Chicago style?
When an online source does not list a publication date, replace it with an access date in your Chicago footnotes and your bibliography:
If you are using author-date in-text citations, or if the source was not accessed online, replace the date with “n.d.”
To automatically generate accurate Chicago references, you can use Scribbr’s free Chicago reference generator. We also recommend using QuillBot’s online Notepad to help you keep track of source information.