George Washington signs the Postal Service Act. (2013). The History Channel website. Retrieved 4:14, May 23, 2013, from http://www.history.com/this-day-in-history/george-washington-signs-the-postal-service-act.
George Washington signs the Postal Service Act. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/george-washington-signs-the-postal-service-act [Accessed 23 May 2013].
“George Washington signs the Postal Service Act.” 2013. The History Channel website. May 23 2013, 4:14 http://www.history.com/this-day-in-history/george-washington-signs-the-postal-service-act.
“George Washington signs the Postal Service Act,” The History Channel website, 2013, http://www.history.com/this-day-in-history/george-washington-signs-the-postal-service-act [accessed May 23, 2013].
“George Washington signs the Postal Service Act,” The History Channel website, http://www.history.com/this-day-in-history/george-washington-signs-the-postal-service-act (accessed May 23, 2013).
George Washington signs the Postal Service Act [Internet]. The History Channel website; 2013 [cited 2013 May 23] Available from: http://www.history.com/this-day-in-history/george-washington-signs-the-postal-service-act.
George Washington signs the Postal Service Act, http://www.history.com/this-day-in-history/george-washington-signs-the-postal-service-act (last visited May 23, 2013).
George Washington signs the Postal Service Act. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/george-washington-signs-the-postal-service-act. Accessed May 23, 2013.