Cargo ship suddenly sinks in Lake Superior. (2013). The History Channel website. Retrieved 5:54, May 22, 2013, from http://www.history.com/this-day-in-history/cargo-ship-suddenly-sinks-in-lake-superior.
Cargo ship suddenly sinks in Lake Superior. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/cargo-ship-suddenly-sinks-in-lake-superior [Accessed 22 May 2013].
“Cargo ship suddenly sinks in Lake Superior.” 2013. The History Channel website. May 22 2013, 5:54 http://www.history.com/this-day-in-history/cargo-ship-suddenly-sinks-in-lake-superior.
“Cargo ship suddenly sinks in Lake Superior,” The History Channel website, 2013, http://www.history.com/this-day-in-history/cargo-ship-suddenly-sinks-in-lake-superior [accessed May 22, 2013].
“Cargo ship suddenly sinks in Lake Superior,” The History Channel website, http://www.history.com/this-day-in-history/cargo-ship-suddenly-sinks-in-lake-superior (accessed May 22, 2013).
Cargo ship suddenly sinks in Lake Superior [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/this-day-in-history/cargo-ship-suddenly-sinks-in-lake-superior.
Cargo ship suddenly sinks in Lake Superior, http://www.history.com/this-day-in-history/cargo-ship-suddenly-sinks-in-lake-superior (last visited May 22, 2013).
Cargo ship suddenly sinks in Lake Superior. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/cargo-ship-suddenly-sinks-in-lake-superior. Accessed May 22, 2013.