Unrecorded classes, lectures, workshops, talks, presentations, etc. are not included in the reference list, as the reader cannot verify the information. An in-text citation refers to a class or lecture as personal communication with the lecturer's name and the date.
Examples:
During the lecture (A. Smith, personal communication, December 17, 2024), we were informed …
Professor A. Smith (personal communication, December 17, 2024), informed us …