Eisenhower takes first presidential ride in a helicopter. (2013). The History Channel website. Retrieved 2:11, May 23, 2013, from http://www.history.com/this-day-in-history/eisenhower-takes-first-presidential-ride-in-a-helicopter.
Eisenhower takes first presidential ride in a helicopter. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/eisenhower-takes-first-presidential-ride-in-a-helicopter [Accessed 23 May 2013].
“Eisenhower takes first presidential ride in a helicopter.” 2013. The History Channel website. May 23 2013, 2:11 http://www.history.com/this-day-in-history/eisenhower-takes-first-presidential-ride-in-a-helicopter.
“Eisenhower takes first presidential ride in a helicopter,” The History Channel website, 2013, http://www.history.com/this-day-in-history/eisenhower-takes-first-presidential-ride-in-a-helicopter [accessed May 23, 2013].
“Eisenhower takes first presidential ride in a helicopter,” The History Channel website, http://www.history.com/this-day-in-history/eisenhower-takes-first-presidential-ride-in-a-helicopter (accessed May 23, 2013).
Eisenhower takes first presidential ride in a helicopter [Internet]. The History Channel website; 2013 [cited 2013 May 23] Available from: http://www.history.com/this-day-in-history/eisenhower-takes-first-presidential-ride-in-a-helicopter.
Eisenhower takes first presidential ride in a helicopter, http://www.history.com/this-day-in-history/eisenhower-takes-first-presidential-ride-in-a-helicopter (last visited May 23, 2013).
Eisenhower takes first presidential ride in a helicopter. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/eisenhower-takes-first-presidential-ride-in-a-helicopter. Accessed May 23, 2013.