117,000 combat missions flown over North Vietnam in three years. (2013). The History Channel website. Retrieved 3:23, May 23, 2013, from http://www.history.com/this-day-in-history/117000-combat-missions-flown-over-north-vietnam-in-three-years.
117,000 combat missions flown over North Vietnam in three years. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/117000-combat-missions-flown-over-north-vietnam-in-three-years [Accessed 23 May 2013].
“117,000 combat missions flown over North Vietnam in three years.” 2013. The History Channel website. May 23 2013, 3:23 http://www.history.com/this-day-in-history/117000-combat-missions-flown-over-north-vietnam-in-three-years.
“117,000 combat missions flown over North Vietnam in three years,” The History Channel website, 2013, http://www.history.com/this-day-in-history/117000-combat-missions-flown-over-north-vietnam-in-three-years [accessed May 23, 2013].
“117,000 combat missions flown over North Vietnam in three years,” The History Channel website, http://www.history.com/this-day-in-history/117000-combat-missions-flown-over-north-vietnam-in-three-years (accessed May 23, 2013).
117,000 combat missions flown over North Vietnam in three years [Internet]. The History Channel website; 2013 [cited 2013 May 23] Available from: http://www.history.com/this-day-in-history/117000-combat-missions-flown-over-north-vietnam-in-three-years.
117,000 combat missions flown over North Vietnam in three years, http://www.history.com/this-day-in-history/117000-combat-missions-flown-over-north-vietnam-in-three-years (last visited May 23, 2013).
117,000 combat missions flown over North Vietnam in three years. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/117000-combat-missions-flown-over-north-vietnam-in-three-years. Accessed May 23, 2013.