First American Olympiad. (2013). The History Channel website. Retrieved 1:54, June 19, 2013, from http://www.history.com/this-day-in-history/first-american-olympiad.
First American Olympiad. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/first-american-olympiad [Accessed 19 Jun 2013].
“First American Olympiad.” 2013. The History Channel website. Jun 19 2013, 1:54 http://www.history.com/this-day-in-history/first-american-olympiad.
“First American Olympiad,” The History Channel website, 2013, http://www.history.com/this-day-in-history/first-american-olympiad [accessed Jun 19, 2013].
“First American Olympiad,” The History Channel website, http://www.history.com/this-day-in-history/first-american-olympiad (accessed Jun 19, 2013).
First American Olympiad [Internet]. The History Channel website; 2013 [cited 2013 Jun 19] Available from: http://www.history.com/this-day-in-history/first-american-olympiad.
First American Olympiad, http://www.history.com/this-day-in-history/first-american-olympiad (last visited Jun 19, 2013).
First American Olympiad. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/first-american-olympiad. Accessed Jun 19, 2013.