U.S. steamship Tuscania is torpedoed and sinks. (2013). The History Channel website. Retrieved 7:14, May 18, 2013, from http://www.history.com/this-day-in-history/us-steamship-tuscania-is-torpedoed-and-sinks.
U.S. steamship Tuscania is torpedoed and sinks. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/us-steamship-tuscania-is-torpedoed-and-sinks [Accessed 18 May 2013].
“U.S. steamship Tuscania is torpedoed and sinks.” 2013. The History Channel website. May 18 2013, 7:14 http://www.history.com/this-day-in-history/us-steamship-tuscania-is-torpedoed-and-sinks.
“U.S. steamship Tuscania is torpedoed and sinks,” The History Channel website, 2013, http://www.history.com/this-day-in-history/us-steamship-tuscania-is-torpedoed-and-sinks [accessed May 18, 2013].
“U.S. steamship Tuscania is torpedoed and sinks,” The History Channel website, http://www.history.com/this-day-in-history/us-steamship-tuscania-is-torpedoed-and-sinks (accessed May 18, 2013).
U.S. steamship Tuscania is torpedoed and sinks [Internet]. The History Channel website; 2013 [cited 2013 May 18] Available from: http://www.history.com/this-day-in-history/us-steamship-tuscania-is-torpedoed-and-sinks.
U.S. steamship Tuscania is torpedoed and sinks, http://www.history.com/this-day-in-history/us-steamship-tuscania-is-torpedoed-and-sinks (last visited May 18, 2013).
U.S. steamship Tuscania is torpedoed and sinks. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/us-steamship-tuscania-is-torpedoed-and-sinks. Accessed May 18, 2013.