Aerial offensive against North Vietnam continues. (2013). The History Channel website. Retrieved 3:21, May 21, 2013, from http://www.history.com/this-day-in-history/aerial-offensive-against-north-vietnam-continues.
Aerial offensive against North Vietnam continues. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/aerial-offensive-against-north-vietnam-continues [Accessed 21 May 2013].
“Aerial offensive against North Vietnam continues.” 2013. The History Channel website. May 21 2013, 3:21 http://www.history.com/this-day-in-history/aerial-offensive-against-north-vietnam-continues.
“Aerial offensive against North Vietnam continues,” The History Channel website, 2013, http://www.history.com/this-day-in-history/aerial-offensive-against-north-vietnam-continues [accessed May 21, 2013].
“Aerial offensive against North Vietnam continues,” The History Channel website, http://www.history.com/this-day-in-history/aerial-offensive-against-north-vietnam-continues (accessed May 21, 2013).
Aerial offensive against North Vietnam continues [Internet]. The History Channel website; 2013 [cited 2013 May 21] Available from: http://www.history.com/this-day-in-history/aerial-offensive-against-north-vietnam-continues.
Aerial offensive against North Vietnam continues, http://www.history.com/this-day-in-history/aerial-offensive-against-north-vietnam-continues (last visited May 21, 2013).
Aerial offensive against North Vietnam continues. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/aerial-offensive-against-north-vietnam-continues. Accessed May 21, 2013.