↑ General Purposes of Speaking. 2012 – melalui [books.lardbucket.org Lardbucket]. |access-date= memerlukan |url= (bantuan)
↑ Ridgley, Stanley K. (2012). The Complete Guide to Business School Presenting: What your professors don't tell you... What you absolutely must know. Anthem Press.
↑ Fetterman, David M. (1997) Videoconferencing over the Internet. Stanford University