Secret Service Communicates During Reagan Assassination Attempt. (2013). The History Channel website. Retrieved 9:01, May 22, 2013, from http://www.history.com/speeches/secret-service-communicates-during-reagan-assassination-attempt.
Secret Service Communicates During Reagan Assassination Attempt. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/speeches/secret-service-communicates-during-reagan-assassination-attempt [Accessed 22 May 2013].
“Secret Service Communicates During Reagan Assassination Attempt.” 2013. The History Channel website. May 22 2013, 9:01 http://www.history.com/speeches/secret-service-communicates-during-reagan-assassination-attempt.
“Secret Service Communicates During Reagan Assassination Attempt,” The History Channel website, 2013, http://www.history.com/speeches/secret-service-communicates-during-reagan-assassination-attempt [accessed May 22, 2013].
“Secret Service Communicates During Reagan Assassination Attempt,” The History Channel website, http://www.history.com/speeches/secret-service-communicates-during-reagan-assassination-attempt (accessed May 22, 2013).
Secret Service Communicates During Reagan Assassination Attempt [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/speeches/secret-service-communicates-during-reagan-assassination-attempt.
Secret Service Communicates During Reagan Assassination Attempt, http://www.history.com/speeches/secret-service-communicates-during-reagan-assassination-attempt (last visited May 22, 2013).
Secret Service Communicates During Reagan Assassination Attempt. The History Channel website. 2013. Available at: http://www.history.com/speeches/secret-service-communicates-during-reagan-assassination-attempt. Accessed May 22, 2013.