Three Things You Didn't Know About: Balls. (2013). The History Channel website. Retrieved 8:42, June 20, 2013, from http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about.
Three Things You Didn't Know About: Balls. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about [Accessed 20 Jun 2013].
“Three Things You Didn't Know About: Balls.” 2013. The History Channel website. Jun 20 2013, 8:42 http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about.
“Three Things You Didn't Know About: Balls,” The History Channel website, 2013, http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about [accessed Jun 20, 2013].
“Three Things You Didn't Know About: Balls,” The History Channel website, http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about (accessed Jun 20, 2013).
Three Things You Didn't Know About: Balls [Internet]. The History Channel website; 2013 [cited 2013 Jun 20] Available from: http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about.
Three Things You Didn't Know About: Balls, http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about (last visited Jun 20, 2013).
Three Things You Didn't Know About: Balls. The History Channel website. 2013. Available at: http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about. Accessed Jun 20, 2013.