Ali defeats Spinks to win world heavyweight championship. (2013). The History Channel website. Retrieved 5:18, June 19, 2013, from http://www.history.com/this-day-in-history/ali-defeats-spinks-to-win-world-heavyweight-championship.
Ali defeats Spinks to win world heavyweight championship. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/ali-defeats-spinks-to-win-world-heavyweight-championship [Accessed 19 Jun 2013].
“Ali defeats Spinks to win world heavyweight championship.” 2013. The History Channel website. Jun 19 2013, 5:18 http://www.history.com/this-day-in-history/ali-defeats-spinks-to-win-world-heavyweight-championship.
“Ali defeats Spinks to win world heavyweight championship,” The History Channel website, 2013, http://www.history.com/this-day-in-history/ali-defeats-spinks-to-win-world-heavyweight-championship [accessed Jun 19, 2013].
“Ali defeats Spinks to win world heavyweight championship,” The History Channel website, http://www.history.com/this-day-in-history/ali-defeats-spinks-to-win-world-heavyweight-championship (accessed Jun 19, 2013).
Ali defeats Spinks to win world heavyweight championship [Internet]. The History Channel website; 2013 [cited 2013 Jun 19] Available from: http://www.history.com/this-day-in-history/ali-defeats-spinks-to-win-world-heavyweight-championship.
Ali defeats Spinks to win world heavyweight championship, http://www.history.com/this-day-in-history/ali-defeats-spinks-to-win-world-heavyweight-championship (last visited Jun 19, 2013).
Ali defeats Spinks to win world heavyweight championship. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/ali-defeats-spinks-to-win-world-heavyweight-championship. Accessed Jun 19, 2013.