Oil flows in Alaska. (2013). The History Channel website. Retrieved 10:03, May 23, 2013, from http://www.history.com/this-day-in-history/oil-flows-in-alaska.
Oil flows in Alaska. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/oil-flows-in-alaska [Accessed 23 May 2013].
“Oil flows in Alaska.” 2013. The History Channel website. May 23 2013, 10:03 http://www.history.com/this-day-in-history/oil-flows-in-alaska.
“Oil flows in Alaska,” The History Channel website, 2013, http://www.history.com/this-day-in-history/oil-flows-in-alaska [accessed May 23, 2013].
“Oil flows in Alaska,” The History Channel website, http://www.history.com/this-day-in-history/oil-flows-in-alaska (accessed May 23, 2013).
Oil flows in Alaska [Internet]. The History Channel website; 2013 [cited 2013 May 23] Available from: http://www.history.com/this-day-in-history/oil-flows-in-alaska.
Oil flows in Alaska, http://www.history.com/this-day-in-history/oil-flows-in-alaska (last visited May 23, 2013).
Oil flows in Alaska. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/oil-flows-in-alaska. Accessed May 23, 2013.