United States nicknamed Uncle Sam. (2013). The History Channel website. Retrieved 8:09, May 23, 2013, from http://www.history.com/this-day-in-history/united-states-nicknamed-uncle-sam.
United States nicknamed Uncle Sam. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/united-states-nicknamed-uncle-sam [Accessed 23 May 2013].
“United States nicknamed Uncle Sam.” 2013. The History Channel website. May 23 2013, 8:09 http://www.history.com/this-day-in-history/united-states-nicknamed-uncle-sam.
“United States nicknamed Uncle Sam,” The History Channel website, 2013, http://www.history.com/this-day-in-history/united-states-nicknamed-uncle-sam [accessed May 23, 2013].
“United States nicknamed Uncle Sam,” The History Channel website, http://www.history.com/this-day-in-history/united-states-nicknamed-uncle-sam (accessed May 23, 2013).
United States nicknamed Uncle Sam [Internet]. The History Channel website; 2013 [cited 2013 May 23] Available from: http://www.history.com/this-day-in-history/united-states-nicknamed-uncle-sam.
United States nicknamed Uncle Sam, http://www.history.com/this-day-in-history/united-states-nicknamed-uncle-sam (last visited May 23, 2013).
United States nicknamed Uncle Sam. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/united-states-nicknamed-uncle-sam. Accessed May 23, 2013.