Three Things You Didn't Know About: Corn. (2013). The History Channel website. Retrieved 12:43, May 19, 2013, from http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about.
Three Things You Didn't Know About: Corn. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about [Accessed 19 May 2013].
“Three Things You Didn't Know About: Corn.” 2013. The History Channel website. May 19 2013, 12:43 http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about.
“Three Things You Didn't Know About: Corn,” The History Channel website, 2013, http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about [accessed May 19, 2013].
“Three Things You Didn't Know About: Corn,” The History Channel website, http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about (accessed May 19, 2013).
Three Things You Didn't Know About: Corn [Internet]. The History Channel website; 2013 [cited 2013 May 19] Available from: http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about.
Three Things You Didn't Know About: Corn, http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about (last visited May 19, 2013).
Three Things You Didn't Know About: Corn. The History Channel website. 2013. Available at: http://www.history.com/shows/modern-marvels/videos/playlists/three-things-you-didnt-know-about. Accessed May 19, 2013.