PowerPoint presentations can be cited as a lecture or a personal communication in American Psychological Association style. When using in-text citations for a lecture, cite the source using the professor’s last name and date. On your References page, include the professor’s name and date, and put the presentation title in italics, noting the PowerPoint in brackets after the title. For example: Henry, J. (2014). Romeo and Juliet [PowerPoint presentation]. Richmond, VA. A personal communication is cited in-text but not on your source page, for example: (J. Henry, personal communication, February 14, 2014).
For Modern Language Association style, your Works Cited includes the venue for the lecture, and the presentation title is in quotations, for example: Henry, John. “Romeo and Juliet.” PowerPoint presentation. XYZ University. Richmond, VA. 14 February 2014. Keynote address.
For online PowerPoint presentations, reference American Psychological Association as previously discussed, but include the URL. For example: Henry, J. (2014). Romeo and Juliet [PowerPoint Slides]. Retrieved from http://themakingoftragiclovestory.ppt. List Modern Language Association as follows: Henry, John. “Romeo and Juliet.” 14 February 2014. PowerPoint Presentation.