Speech transmitted by telephone. (2013). The History Channel website. Retrieved 5:30, June 18, 2013, from http://www.history.com/this-day-in-history/speech-transmitted-by-telephone.
Speech transmitted by telephone. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/speech-transmitted-by-telephone [Accessed 18 Jun 2013].
“Speech transmitted by telephone.” 2013. The History Channel website. Jun 18 2013, 5:30 http://www.history.com/this-day-in-history/speech-transmitted-by-telephone.
“Speech transmitted by telephone,” The History Channel website, 2013, http://www.history.com/this-day-in-history/speech-transmitted-by-telephone [accessed Jun 18, 2013].
“Speech transmitted by telephone,” The History Channel website, http://www.history.com/this-day-in-history/speech-transmitted-by-telephone (accessed Jun 18, 2013).
Speech transmitted by telephone [Internet]. The History Channel website; 2013 [cited 2013 Jun 18] Available from: http://www.history.com/this-day-in-history/speech-transmitted-by-telephone.
Speech transmitted by telephone, http://www.history.com/this-day-in-history/speech-transmitted-by-telephone (last visited Jun 18, 2013).
Speech transmitted by telephone. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/speech-transmitted-by-telephone. Accessed Jun 18, 2013.