Chicago 18th edition author-date

As there are no directions given in Chicago author-date for conference papers, these instructions have been adapted from the notes-bibliography style.  

Usually, citations to papers presented at a conference are limited to the text but if a more formal reference is required:  

• A paper included in the published proceedings of a meeting may be treated like a book chapter.
• If published in a journal, it is treated as an article.

Details of the sponsorship, location, and date of the meeting at which a speech was given or a paper, slides, or poster presented follow the title. In previous editions of Chicago this information was put in parentheses.  This is no longer the case.  If the information is available online, include a URL. (14.115). 

Dates will vary according to whether US or Australian format is being followed.