Nixon orders the initiation of Operation Linebacker II. (2013). The History Channel website. Retrieved 4:51, May 25, 2013, from http://www.history.com/this-day-in-history/nixon-orders-the-initiation-of-operation-linebacker-ii.
Nixon orders the initiation of Operation Linebacker II. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/nixon-orders-the-initiation-of-operation-linebacker-ii [Accessed 25 May 2013].
“Nixon orders the initiation of Operation Linebacker II.” 2013. The History Channel website. May 25 2013, 4:51 http://www.history.com/this-day-in-history/nixon-orders-the-initiation-of-operation-linebacker-ii.
“Nixon orders the initiation of Operation Linebacker II,” The History Channel website, 2013, http://www.history.com/this-day-in-history/nixon-orders-the-initiation-of-operation-linebacker-ii [accessed May 25, 2013].
“Nixon orders the initiation of Operation Linebacker II,” The History Channel website, http://www.history.com/this-day-in-history/nixon-orders-the-initiation-of-operation-linebacker-ii (accessed May 25, 2013).
Nixon orders the initiation of Operation Linebacker II [Internet]. The History Channel website; 2013 [cited 2013 May 25] Available from: http://www.history.com/this-day-in-history/nixon-orders-the-initiation-of-operation-linebacker-ii.
Nixon orders the initiation of Operation Linebacker II, http://www.history.com/this-day-in-history/nixon-orders-the-initiation-of-operation-linebacker-ii (last visited May 25, 2013).
Nixon orders the initiation of Operation Linebacker II. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/nixon-orders-the-initiation-of-operation-linebacker-ii. Accessed May 25, 2013.