F. Lastname, "Title of slides," presented to Class, Institution, City, State, Country, Month Day, Year. [PowerPointslides]. Available: URL, Accessed on: Month Day, Year.
K. Horowicz and L. Nicosia, "ARTstor: More than just art!" presented to MUSE 101-01 Intro. to Museum Studies, Rochester Inst. of Technol., NY, USA, Jan. 8, 2011. [PowerPoint slides]. Available: http://mycourses.rit.edu/d2l/home/479317, Accessed on: Dec. 12, 2017.
Class PowerPoints are not usually retrievable by others outside of the class and should be used sparingly. Use [PowerPoint slides] or another appropriate descriptive label to indicate that you are not citing a traditional text source. Consider including an access date for online materials, especially if you do not know the date of publication; when the access date is used in place of the date of publication, place it immediately after the country of publication (see p. 39, "Books, Monographs: Examples," 4).
Questions? Contact an RIT Librarian at firstname.lastname@example.org