A manual for writers of research papers, theses, and dissertations, 7th edition - Kate L. Turabian 2007

Lectures and papers presented at meetings
Parenthetical citations–reference list style: citing specific types of sources
Part II. Source Citation

After the author, date, and title of the speech or paper, list the sponsorship, location, and (if available) specific day of the meeting at which it was given. The word unpublished is unnecessary.

R: Troutman, John. 2005. Indian blues: American Indians and the politics of music, 1890—1935. Lecture, Newberry Library, Chicago, IL. February 2.

Grad, Karene. 2004. When high culture was popular culture. Paper presented at the annual meeting of the Organization of American Historians, Boston, MA. March 26.

Skocpol, Theda. 2003. Voice and inequality: The transformation of American civic democracy. Presidential address, annual meeting of the American Political Science Association, Philadelphia, PA. August 28.