10,000 Years After People. (2013). The History Channel website. Retrieved 1:25, June 19, 2013, from http://www.history.com/shows/life-after-people/videos/playlists/what-will-happen-after-people.
10,000 Years After People. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/shows/life-after-people/videos/playlists/what-will-happen-after-people [Accessed 19 Jun 2013].
“10,000 Years After People.” 2013. The History Channel website. Jun 19 2013, 1:25 http://www.history.com/shows/life-after-people/videos/playlists/what-will-happen-after-people.
“10,000 Years After People,” The History Channel website, 2013, http://www.history.com/shows/life-after-people/videos/playlists/what-will-happen-after-people [accessed Jun 19, 2013].
“10,000 Years After People,” The History Channel website, http://www.history.com/shows/life-after-people/videos/playlists/what-will-happen-after-people (accessed Jun 19, 2013).
10,000 Years After People [Internet]. The History Channel website; 2013 [cited 2013 Jun 19] Available from: http://www.history.com/shows/life-after-people/videos/playlists/what-will-happen-after-people.
10,000 Years After People, http://www.history.com/shows/life-after-people/videos/playlists/what-will-happen-after-people (last visited Jun 19, 2013).
10,000 Years After People. The History Channel website. 2013. Available at: http://www.history.com/shows/life-after-people/videos/playlists/what-will-happen-after-people. Accessed Jun 19, 2013.