Defense Department reports eight B-52s lost during Linebacker II. (2013). The History Channel website. Retrieved 7:33, June 19, 2013, from http://www.history.com/this-day-in-history/defense-department-reports-eight-b-52s-lost-during-linebacker-ii.
Defense Department reports eight B-52s lost during Linebacker II. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/defense-department-reports-eight-b-52s-lost-during-linebacker-ii [Accessed 19 Jun 2013].
“Defense Department reports eight B-52s lost during Linebacker II.” 2013. The History Channel website. Jun 19 2013, 7:33 http://www.history.com/this-day-in-history/defense-department-reports-eight-b-52s-lost-during-linebacker-ii.
“Defense Department reports eight B-52s lost during Linebacker II,” The History Channel website, 2013, http://www.history.com/this-day-in-history/defense-department-reports-eight-b-52s-lost-during-linebacker-ii [accessed Jun 19, 2013].
“Defense Department reports eight B-52s lost during Linebacker II,” The History Channel website, http://www.history.com/this-day-in-history/defense-department-reports-eight-b-52s-lost-during-linebacker-ii (accessed Jun 19, 2013).
Defense Department reports eight B-52s lost during Linebacker II [Internet]. The History Channel website; 2013 [cited 2013 Jun 19] Available from: http://www.history.com/this-day-in-history/defense-department-reports-eight-b-52s-lost-during-linebacker-ii.
Defense Department reports eight B-52s lost during Linebacker II, http://www.history.com/this-day-in-history/defense-department-reports-eight-b-52s-lost-during-linebacker-ii (last visited Jun 19, 2013).
Defense Department reports eight B-52s lost during Linebacker II. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/defense-department-reports-eight-b-52s-lost-during-linebacker-ii. Accessed Jun 19, 2013.