American vessel sunk by sperm whale. (2013). The History Channel website. Retrieved 5:19, June 19, 2013, from http://www.history.com/this-day-in-history/american-vessel-sunk-by-sperm-whale.
American vessel sunk by sperm whale. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/american-vessel-sunk-by-sperm-whale [Accessed 19 Jun 2013].
“American vessel sunk by sperm whale.” 2013. The History Channel website. Jun 19 2013, 5:19 http://www.history.com/this-day-in-history/american-vessel-sunk-by-sperm-whale.
“American vessel sunk by sperm whale,” The History Channel website, 2013, http://www.history.com/this-day-in-history/american-vessel-sunk-by-sperm-whale [accessed Jun 19, 2013].
“American vessel sunk by sperm whale,” The History Channel website, http://www.history.com/this-day-in-history/american-vessel-sunk-by-sperm-whale (accessed Jun 19, 2013).
American vessel sunk by sperm whale [Internet]. The History Channel website; 2013 [cited 2013 Jun 19] Available from: http://www.history.com/this-day-in-history/american-vessel-sunk-by-sperm-whale.
American vessel sunk by sperm whale, http://www.history.com/this-day-in-history/american-vessel-sunk-by-sperm-whale (last visited Jun 19, 2013).
American vessel sunk by sperm whale. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/american-vessel-sunk-by-sperm-whale. Accessed Jun 19, 2013.