Trains buried by avalanche. (2013). The History Channel website. Retrieved 5:10, May 19, 2013, from http://www.history.com/this-day-in-history/trains-buried-by-avalanche.
Trains buried by avalanche. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/trains-buried-by-avalanche [Accessed 19 May 2013].
“Trains buried by avalanche.” 2013. The History Channel website. May 19 2013, 5:10 http://www.history.com/this-day-in-history/trains-buried-by-avalanche.
“Trains buried by avalanche,” The History Channel website, 2013, http://www.history.com/this-day-in-history/trains-buried-by-avalanche [accessed May 19, 2013].
“Trains buried by avalanche,” The History Channel website, http://www.history.com/this-day-in-history/trains-buried-by-avalanche (accessed May 19, 2013).
Trains buried by avalanche [Internet]. The History Channel website; 2013 [cited 2013 May 19] Available from: http://www.history.com/this-day-in-history/trains-buried-by-avalanche.
Trains buried by avalanche, http://www.history.com/this-day-in-history/trains-buried-by-avalanche (last visited May 19, 2013).
Trains buried by avalanche. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/trains-buried-by-avalanche. Accessed May 19, 2013.