Trapped Russian sub rescued. (2013). The History Channel website. Retrieved 8:00, June 19, 2013, from http://www.history.com/this-day-in-history/trapped-russian-sub-rescued.
Trapped Russian sub rescued. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/trapped-russian-sub-rescued [Accessed 19 Jun 2013].
“Trapped Russian sub rescued.” 2013. The History Channel website. Jun 19 2013, 8:00 http://www.history.com/this-day-in-history/trapped-russian-sub-rescued.
“Trapped Russian sub rescued,” The History Channel website, 2013, http://www.history.com/this-day-in-history/trapped-russian-sub-rescued [accessed Jun 19, 2013].
“Trapped Russian sub rescued,” The History Channel website, http://www.history.com/this-day-in-history/trapped-russian-sub-rescued (accessed Jun 19, 2013).
Trapped Russian sub rescued [Internet]. The History Channel website; 2013 [cited 2013 Jun 19] Available from: http://www.history.com/this-day-in-history/trapped-russian-sub-rescued.
Trapped Russian sub rescued, http://www.history.com/this-day-in-history/trapped-russian-sub-rescued (last visited Jun 19, 2013).
Trapped Russian sub rescued. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/trapped-russian-sub-rescued. Accessed Jun 19, 2013.