Speaker, S.S. (Year, Month). Title of presentation. In E.E. Chairperson (Chair), Title of conference/venue. Symposium/talk/address conducted at the meeting of Organization Name, Location.
Presentation at Conference
Urban, T. (2016, February). Inside the mind of a master procrastinator. TED2016. Talk presented at 2016 TED conference, Vancouver, Canada.
Lecture Notes or Presentation Slides
Wilson, T. (2018). Social media and education: A timeline of education online [Powerpoint slides]. Retrieved from http://www.slideshare.net
Personal communications such as emails and interviews should not be included in your reference list. Instead, cite the communicator's name, the phrase "personal communication," and the date of the communication in your main text only.
Dr. Robbins claimed that his students didn't know how to cite personal communications (personal communication, August 30, 2017).