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“Who Were the Vikings?path=/videos/who-were-the-vikings,” The History Channel website, 2013, http://www.history.com/ [accessed May 24, 2013].
“Who Were the Vikings?path=/videos/who-were-the-vikings,” The History Channel website, http://www.history.com/ (accessed May 24, 2013).
Who Were the Vikings?path=/videos/who-were-the-vikings [Internet]. The History Channel website; 2013 [cited 2013 May 24] Available from: http://www.history.com/.
Who Were the Vikings?path=/videos/who-were-the-vikings, http://www.history.com/ (last visited May 24, 2013).
Who Were the Vikings?path=/videos/who-were-the-vikings. The History Channel website. 2013. Available at: http://www.history.com/. Accessed May 24, 2013.