The Nixon Doctrine is announced. (2013). The History Channel website. Retrieved 12:45, May 22, 2013, from http://www.history.com/this-day-in-history/the-nixon-doctrine-is-announced.
The Nixon Doctrine is announced. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/the-nixon-doctrine-is-announced [Accessed 22 May 2013].
“The Nixon Doctrine is announced.” 2013. The History Channel website. May 22 2013, 12:45 http://www.history.com/this-day-in-history/the-nixon-doctrine-is-announced.
“The Nixon Doctrine is announced,” The History Channel website, 2013, http://www.history.com/this-day-in-history/the-nixon-doctrine-is-announced [accessed May 22, 2013].
“The Nixon Doctrine is announced,” The History Channel website, http://www.history.com/this-day-in-history/the-nixon-doctrine-is-announced (accessed May 22, 2013).
The Nixon Doctrine is announced [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/this-day-in-history/the-nixon-doctrine-is-announced.
The Nixon Doctrine is announced, http://www.history.com/this-day-in-history/the-nixon-doctrine-is-announced (last visited May 22, 2013).
The Nixon Doctrine is announced. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/the-nixon-doctrine-is-announced. Accessed May 22, 2013.