Spectator death forces new rules for NHL games. (2013). The History Channel website. Retrieved 5:21, May 22, 2013, from http://www.history.com/this-day-in-history/spectator-death-forces-new-rules-for-nhl-games.
Spectator death forces new rules for NHL games. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/spectator-death-forces-new-rules-for-nhl-games [Accessed 22 May 2013].
“Spectator death forces new rules for NHL games.” 2013. The History Channel website. May 22 2013, 5:21 http://www.history.com/this-day-in-history/spectator-death-forces-new-rules-for-nhl-games.
“Spectator death forces new rules for NHL games,” The History Channel website, 2013, http://www.history.com/this-day-in-history/spectator-death-forces-new-rules-for-nhl-games [accessed May 22, 2013].
“Spectator death forces new rules for NHL games,” The History Channel website, http://www.history.com/this-day-in-history/spectator-death-forces-new-rules-for-nhl-games (accessed May 22, 2013).
Spectator death forces new rules for NHL games [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/this-day-in-history/spectator-death-forces-new-rules-for-nhl-games.
Spectator death forces new rules for NHL games, http://www.history.com/this-day-in-history/spectator-death-forces-new-rules-for-nhl-games (last visited May 22, 2013).
Spectator death forces new rules for NHL games. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/spectator-death-forces-new-rules-for-nhl-games. Accessed May 22, 2013.