Mike Tyson becomes the youngest heavyweight champ in history. (2013). The History Channel website. Retrieved 1:45, May 23, 2013, from http://www.history.com/this-day-in-history/mike-tyson-becomes-the-youngest-heavyweight-champ-in-history.
Mike Tyson becomes the youngest heavyweight champ in history. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/mike-tyson-becomes-the-youngest-heavyweight-champ-in-history [Accessed 23 May 2013].
“Mike Tyson becomes the youngest heavyweight champ in history.” 2013. The History Channel website. May 23 2013, 1:45 http://www.history.com/this-day-in-history/mike-tyson-becomes-the-youngest-heavyweight-champ-in-history.
“Mike Tyson becomes the youngest heavyweight champ in history,” The History Channel website, 2013, http://www.history.com/this-day-in-history/mike-tyson-becomes-the-youngest-heavyweight-champ-in-history [accessed May 23, 2013].
“Mike Tyson becomes the youngest heavyweight champ in history,” The History Channel website, http://www.history.com/this-day-in-history/mike-tyson-becomes-the-youngest-heavyweight-champ-in-history (accessed May 23, 2013).
Mike Tyson becomes the youngest heavyweight champ in history [Internet]. The History Channel website; 2013 [cited 2013 May 23] Available from: http://www.history.com/this-day-in-history/mike-tyson-becomes-the-youngest-heavyweight-champ-in-history.
Mike Tyson becomes the youngest heavyweight champ in history, http://www.history.com/this-day-in-history/mike-tyson-becomes-the-youngest-heavyweight-champ-in-history (last visited May 23, 2013).
Mike Tyson becomes the youngest heavyweight champ in history. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/mike-tyson-becomes-the-youngest-heavyweight-champ-in-history. Accessed May 23, 2013.