North Vietnamese Army begins infiltration. (2013). The History Channel website. Retrieved 11:19, June 19, 2013, from http://www.history.com/this-day-in-history/north-vietnamese-army-begins-infiltration.
North Vietnamese Army begins infiltration. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/north-vietnamese-army-begins-infiltration [Accessed 19 Jun 2013].
“North Vietnamese Army begins infiltration.” 2013. The History Channel website. Jun 19 2013, 11:19 http://www.history.com/this-day-in-history/north-vietnamese-army-begins-infiltration.
“North Vietnamese Army begins infiltration,” The History Channel website, 2013, http://www.history.com/this-day-in-history/north-vietnamese-army-begins-infiltration [accessed Jun 19, 2013].
“North Vietnamese Army begins infiltration,” The History Channel website, http://www.history.com/this-day-in-history/north-vietnamese-army-begins-infiltration (accessed Jun 19, 2013).
North Vietnamese Army begins infiltration [Internet]. The History Channel website; 2013 [cited 2013 Jun 19] Available from: http://www.history.com/this-day-in-history/north-vietnamese-army-begins-infiltration.
North Vietnamese Army begins infiltration, http://www.history.com/this-day-in-history/north-vietnamese-army-begins-infiltration (last visited Jun 19, 2013).
North Vietnamese Army begins infiltration. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/north-vietnamese-army-begins-infiltration. Accessed Jun 19, 2013.