John Foster Dulles. (2013). The History Channel website. Retrieved 6:43, May 25, 2013, from http://www.history.com/topics/john-foster-dulles.
John Foster Dulles. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/topics/john-foster-dulles [Accessed 25 May 2013].
“John Foster Dulles.” 2013. The History Channel website. May 25 2013, 6:43 http://www.history.com/topics/john-foster-dulles.
“John Foster Dulles,” The History Channel website, 2013, http://www.history.com/topics/john-foster-dulles [accessed May 25, 2013].
“John Foster Dulles,” The History Channel website, http://www.history.com/topics/john-foster-dulles (accessed May 25, 2013).
John Foster Dulles [Internet]. The History Channel website; 2013 [cited 2013 May 25] Available from: http://www.history.com/topics/john-foster-dulles.
John Foster Dulles, http://www.history.com/topics/john-foster-dulles (last visited May 25, 2013).
John Foster Dulles. The History Channel website. 2013. Available at: http://www.history.com/topics/john-foster-dulles. Accessed May 25, 2013.