America's first Labor Day. (2013). The History Channel website. Retrieved 6:29, May 21, 2013, from http://www.history.com/this-day-in-history/americas-first-labor-day.
America's first Labor Day. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/americas-first-labor-day [Accessed 21 May 2013].
“America's first Labor Day.” 2013. The History Channel website. May 21 2013, 6:29 http://www.history.com/this-day-in-history/americas-first-labor-day.
“America's first Labor Day,” The History Channel website, 2013, http://www.history.com/this-day-in-history/americas-first-labor-day [accessed May 21, 2013].
“America's first Labor Day,” The History Channel website, http://www.history.com/this-day-in-history/americas-first-labor-day (accessed May 21, 2013).
America's first Labor Day [Internet]. The History Channel website; 2013 [cited 2013 May 21] Available from: http://www.history.com/this-day-in-history/americas-first-labor-day.
America's first Labor Day, http://www.history.com/this-day-in-history/americas-first-labor-day (last visited May 21, 2013).
America's first Labor Day. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/americas-first-labor-day. Accessed May 21, 2013.