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

Online multimedia files
Parenthetical citations–reference list style: citing specific types of sources
Part II. Source Citation

If you viewed an image, a live performance, a movie, or a television program or other broadcast source online (including podcasts), cite the online file. Like published works, online multimedia files generally have stable and available identifying information and should be included in your reference list.

Follow the citation principles for the relevant type of source described above. If a file date is difficult to identify, use the abbreviation n.d. or give a date that is otherwise relevant. In addition, list the title of the online site and the type of file. Include the URL and an access date. Note that a URL alone is not sufficient; you must provide additional information so that a reader can search for the source even if the URL changes. If a file lacks an individual URL (as in the second example below), cite the site as a whole.

R: BBC. n.d. “Blair announces new Africa panel.” BBC News Web site. Windows Media Player video file. http://news.bbc.co.uk/nolavconsole/ifs_news/hi/newsid_5110000/newsid_5119200/nb_wm_5119262.stm (accessed June 27, 2006).

Mozart, Wolfgang Amadeus. 1778. “Allegro moderato,” Piano sonata no. 10 in C Major. Kunst der Fuge. MIDI file. http://www.kunstderfuge.com/mozart.htm (accessed November 19, 2005).

To cite a file without a formal date in your text, give the name of the author used in the reference list entry and the title of the work. Include this information either in parentheses or in the text. If relevant, also include the time at which the cited material appears in the file.

P: (BBC n.d., 3:43)