Cities of the Underworld 3: Apocalypse: Templar Castles. (2013). The History Channel website. Retrieved 6:52, May 18, 2013, from http://www.history.com/shows/cities-of-the-underworld/videos/playlists/exclusives.
Cities of the Underworld 3: Apocalypse: Templar Castles. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/shows/cities-of-the-underworld/videos/playlists/exclusives [Accessed 18 May 2013].
“Cities of the Underworld 3: Apocalypse: Templar Castles.” 2013. The History Channel website. May 18 2013, 6:52 http://www.history.com/shows/cities-of-the-underworld/videos/playlists/exclusives.
“Cities of the Underworld 3: Apocalypse: Templar Castles,” The History Channel website, 2013, http://www.history.com/shows/cities-of-the-underworld/videos/playlists/exclusives [accessed May 18, 2013].
“Cities of the Underworld 3: Apocalypse: Templar Castles,” The History Channel website, http://www.history.com/shows/cities-of-the-underworld/videos/playlists/exclusives (accessed May 18, 2013).
Cities of the Underworld 3: Apocalypse: Templar Castles [Internet]. The History Channel website; 2013 [cited 2013 May 18] Available from: http://www.history.com/shows/cities-of-the-underworld/videos/playlists/exclusives.
Cities of the Underworld 3: Apocalypse: Templar Castles, http://www.history.com/shows/cities-of-the-underworld/videos/playlists/exclusives (last visited May 18, 2013).
Cities of the Underworld 3: Apocalypse: Templar Castles. The History Channel website. 2013. Available at: http://www.history.com/shows/cities-of-the-underworld/videos/playlists/exclusives. Accessed May 18, 2013.