Congress establishes the U.S. Army Corps of Engineers. (2013). The History Channel website. Retrieved 10:21, May 19, 2013, from http://www.history.com/this-day-in-history/congress-establishes-the-us-army-corps-of-engineers.
Congress establishes the U.S. Army Corps of Engineers. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/congress-establishes-the-us-army-corps-of-engineers [Accessed 19 May 2013].
“Congress establishes the U.S. Army Corps of Engineers.” 2013. The History Channel website. May 19 2013, 10:21 http://www.history.com/this-day-in-history/congress-establishes-the-us-army-corps-of-engineers.
“Congress establishes the U.S. Army Corps of Engineers,” The History Channel website, 2013, http://www.history.com/this-day-in-history/congress-establishes-the-us-army-corps-of-engineers [accessed May 19, 2013].
“Congress establishes the U.S. Army Corps of Engineers,” The History Channel website, http://www.history.com/this-day-in-history/congress-establishes-the-us-army-corps-of-engineers (accessed May 19, 2013).
Congress establishes the U.S. Army Corps of Engineers [Internet]. The History Channel website; 2013 [cited 2013 May 19] Available from: http://www.history.com/this-day-in-history/congress-establishes-the-us-army-corps-of-engineers.
Congress establishes the U.S. Army Corps of Engineers, http://www.history.com/this-day-in-history/congress-establishes-the-us-army-corps-of-engineers (last visited May 19, 2013).
Congress establishes the U.S. Army Corps of Engineers. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/congress-establishes-the-us-army-corps-of-engineers. Accessed May 19, 2013.