Truman signs National Security Bill. (2013). The History Channel website. Retrieved 10:02, May 20, 2013, from http://www.history.com/this-day-in-history/truman-signs-national-security-bill.
Truman signs National Security Bill. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/truman-signs-national-security-bill [Accessed 20 May 2013].
“Truman signs National Security Bill.” 2013. The History Channel website. May 20 2013, 10:02 http://www.history.com/this-day-in-history/truman-signs-national-security-bill.
“Truman signs National Security Bill,” The History Channel website, 2013, http://www.history.com/this-day-in-history/truman-signs-national-security-bill [accessed May 20, 2013].
“Truman signs National Security Bill,” The History Channel website, http://www.history.com/this-day-in-history/truman-signs-national-security-bill (accessed May 20, 2013).
Truman signs National Security Bill [Internet]. The History Channel website; 2013 [cited 2013 May 20] Available from: http://www.history.com/this-day-in-history/truman-signs-national-security-bill.
Truman signs National Security Bill, http://www.history.com/this-day-in-history/truman-signs-national-security-bill (last visited May 20, 2013).
Truman signs National Security Bill. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/truman-signs-national-security-bill. Accessed May 20, 2013.