Mankind By The Numbers Infographic. (2013). The History Channel website. Retrieved 9:31, May 18, 2013, from http://www.history.com/shows/mankind-the-story-of-all-of-us/interactives/mankind-by-the-numbers-infographic.
Mankind By The Numbers Infographic. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/shows/mankind-the-story-of-all-of-us/interactives/mankind-by-the-numbers-infographic [Accessed 18 May 2013].
“Mankind By The Numbers Infographic.” 2013. The History Channel website. May 18 2013, 9:31 http://www.history.com/shows/mankind-the-story-of-all-of-us/interactives/mankind-by-the-numbers-infographic.
“Mankind By The Numbers Infographic,” The History Channel website, 2013, http://www.history.com/shows/mankind-the-story-of-all-of-us/interactives/mankind-by-the-numbers-infographic [accessed May 18, 2013].
“Mankind By The Numbers Infographic,” The History Channel website, http://www.history.com/shows/mankind-the-story-of-all-of-us/interactives/mankind-by-the-numbers-infographic (accessed May 18, 2013).
Mankind By The Numbers Infographic [Internet]. The History Channel website; 2013 [cited 2013 May 18] Available from: http://www.history.com/shows/mankind-the-story-of-all-of-us/interactives/mankind-by-the-numbers-infographic.
Mankind By The Numbers Infographic, http://www.history.com/shows/mankind-the-story-of-all-of-us/interactives/mankind-by-the-numbers-infographic (last visited May 18, 2013).
Mankind By The Numbers Infographic. The History Channel website. 2013. Available at: http://www.history.com/shows/mankind-the-story-of-all-of-us/interactives/mankind-by-the-numbers-infographic. Accessed May 18, 2013.