Two ships sink in North Sea battle. (2013). The History Channel website. Retrieved 4:29, May 23, 2013, from http://www.history.com/this-day-in-history/two-ships-sink-in-north-sea-battle.
Two ships sink in North Sea battle. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/two-ships-sink-in-north-sea-battle [Accessed 23 May 2013].
“Two ships sink in North Sea battle.” 2013. The History Channel website. May 23 2013, 4:29 http://www.history.com/this-day-in-history/two-ships-sink-in-north-sea-battle.
“Two ships sink in North Sea battle,” The History Channel website, 2013, http://www.history.com/this-day-in-history/two-ships-sink-in-north-sea-battle [accessed May 23, 2013].
“Two ships sink in North Sea battle,” The History Channel website, http://www.history.com/this-day-in-history/two-ships-sink-in-north-sea-battle (accessed May 23, 2013).
Two ships sink in North Sea battle [Internet]. The History Channel website; 2013 [cited 2013 May 23] Available from: http://www.history.com/this-day-in-history/two-ships-sink-in-north-sea-battle.
Two ships sink in North Sea battle, http://www.history.com/this-day-in-history/two-ships-sink-in-north-sea-battle (last visited May 23, 2013).
Two ships sink in North Sea battle. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/two-ships-sink-in-north-sea-battle. Accessed May 23, 2013.