Postal Service Act regulates United States Post Office Department. (2013). The History Channel website. Retrieved 12:26, May 19, 2013, from http://www.history.com/this-day-in-history/postal-service-act-regulates-united-states-post-office-department.
Postal Service Act regulates United States Post Office Department. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/postal-service-act-regulates-united-states-post-office-department [Accessed 19 May 2013].
“Postal Service Act regulates United States Post Office Department.” 2013. The History Channel website. May 19 2013, 12:26 http://www.history.com/this-day-in-history/postal-service-act-regulates-united-states-post-office-department.
“Postal Service Act regulates United States Post Office Department,” The History Channel website, 2013, http://www.history.com/this-day-in-history/postal-service-act-regulates-united-states-post-office-department [accessed May 19, 2013].
“Postal Service Act regulates United States Post Office Department,” The History Channel website, http://www.history.com/this-day-in-history/postal-service-act-regulates-united-states-post-office-department (accessed May 19, 2013).
Postal Service Act regulates United States Post Office Department [Internet]. The History Channel website; 2013 [cited 2013 May 19] Available from: http://www.history.com/this-day-in-history/postal-service-act-regulates-united-states-post-office-department.
Postal Service Act regulates United States Post Office Department, http://www.history.com/this-day-in-history/postal-service-act-regulates-united-states-post-office-department (last visited May 19, 2013).
Postal Service Act regulates United States Post Office Department. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/postal-service-act-regulates-united-states-post-office-department. Accessed May 19, 2013.