Steve Jobs debuts the iPhone. (2013). The History Channel website. Retrieved 10:31, May 20, 2013, from http://www.history.com/this-day-in-history/steve-jobs-debuts-the-iphone.
Steve Jobs debuts the iPhone. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/steve-jobs-debuts-the-iphone [Accessed 20 May 2013].
“Steve Jobs debuts the iPhone.” 2013. The History Channel website. May 20 2013, 10:31 http://www.history.com/this-day-in-history/steve-jobs-debuts-the-iphone.
“Steve Jobs debuts the iPhone,” The History Channel website, 2013, http://www.history.com/this-day-in-history/steve-jobs-debuts-the-iphone [accessed May 20, 2013].
“Steve Jobs debuts the iPhone,” The History Channel website, http://www.history.com/this-day-in-history/steve-jobs-debuts-the-iphone (accessed May 20, 2013).
Steve Jobs debuts the iPhone [Internet]. The History Channel website; 2013 [cited 2013 May 20] Available from: http://www.history.com/this-day-in-history/steve-jobs-debuts-the-iphone.
Steve Jobs debuts the iPhone, http://www.history.com/this-day-in-history/steve-jobs-debuts-the-iphone (last visited May 20, 2013).
Steve Jobs debuts the iPhone. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/steve-jobs-debuts-the-iphone. Accessed May 20, 2013.