McNamara resigns as Secretary of Defense. (2013). The History Channel website. Retrieved 10:26, May 24, 2013, from http://www.history.com/this-day-in-history/mcnamara-resigns-as-secretary-of-defense.
McNamara resigns as Secretary of Defense. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/mcnamara-resigns-as-secretary-of-defense [Accessed 24 May 2013].
“McNamara resigns as Secretary of Defense.” 2013. The History Channel website. May 24 2013, 10:26 http://www.history.com/this-day-in-history/mcnamara-resigns-as-secretary-of-defense.
“McNamara resigns as Secretary of Defense,” The History Channel website, 2013, http://www.history.com/this-day-in-history/mcnamara-resigns-as-secretary-of-defense [accessed May 24, 2013].
“McNamara resigns as Secretary of Defense,” The History Channel website, http://www.history.com/this-day-in-history/mcnamara-resigns-as-secretary-of-defense (accessed May 24, 2013).
McNamara resigns as Secretary of Defense [Internet]. The History Channel website; 2013 [cited 2013 May 24] Available from: http://www.history.com/this-day-in-history/mcnamara-resigns-as-secretary-of-defense.
McNamara resigns as Secretary of Defense, http://www.history.com/this-day-in-history/mcnamara-resigns-as-secretary-of-defense (last visited May 24, 2013).
McNamara resigns as Secretary of Defense. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/mcnamara-resigns-as-secretary-of-defense. Accessed May 24, 2013.