Setting Time Zones. (2013). The History Channel website. Retrieved 5:57, June 19, 2013, from http://www.history.com/shows/how-the-states-got-their-shapes/videos/playlists/web-exclusives.
Setting Time Zones. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/shows/how-the-states-got-their-shapes/videos/playlists/web-exclusives [Accessed 19 Jun 2013].
“Setting Time Zones.” 2013. The History Channel website. Jun 19 2013, 5:57 http://www.history.com/shows/how-the-states-got-their-shapes/videos/playlists/web-exclusives.
“Setting Time Zones,” The History Channel website, 2013, http://www.history.com/shows/how-the-states-got-their-shapes/videos/playlists/web-exclusives [accessed Jun 19, 2013].
“Setting Time Zones,” The History Channel website, http://www.history.com/shows/how-the-states-got-their-shapes/videos/playlists/web-exclusives (accessed Jun 19, 2013).
Setting Time Zones [Internet]. The History Channel website; 2013 [cited 2013 Jun 19] Available from: http://www.history.com/shows/how-the-states-got-their-shapes/videos/playlists/web-exclusives.
Setting Time Zones, http://www.history.com/shows/how-the-states-got-their-shapes/videos/playlists/web-exclusives (last visited Jun 19, 2013).
Setting Time Zones. The History Channel website. 2013. Available at: http://www.history.com/shows/how-the-states-got-their-shapes/videos/playlists/web-exclusives. Accessed Jun 19, 2013.