American woman climbs Everest. (2013). The History Channel website. Retrieved 3:07, May 21, 2013, from http://www.history.com/this-day-in-history/american-woman-climbs-everest.
American woman climbs Everest. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/american-woman-climbs-everest [Accessed 21 May 2013].
“American woman climbs Everest.” 2013. The History Channel website. May 21 2013, 3:07 http://www.history.com/this-day-in-history/american-woman-climbs-everest.
“American woman climbs Everest,” The History Channel website, 2013, http://www.history.com/this-day-in-history/american-woman-climbs-everest [accessed May 21, 2013].
“American woman climbs Everest,” The History Channel website, http://www.history.com/this-day-in-history/american-woman-climbs-everest (accessed May 21, 2013).
American woman climbs Everest [Internet]. The History Channel website; 2013 [cited 2013 May 21] Available from: http://www.history.com/this-day-in-history/american-woman-climbs-everest.
American woman climbs Everest, http://www.history.com/this-day-in-history/american-woman-climbs-everest (last visited May 21, 2013).
American woman climbs Everest. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/american-woman-climbs-everest. Accessed May 21, 2013.