South Vietnam surrenders. (2013). The History Channel website. Retrieved 5:20, May 20, 2013, from http://www.history.com/this-day-in-history/south-vietnam-surrenders.
South Vietnam surrenders. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/south-vietnam-surrenders [Accessed 20 May 2013].
“South Vietnam surrenders.” 2013. The History Channel website. May 20 2013, 5:20 http://www.history.com/this-day-in-history/south-vietnam-surrenders.
“South Vietnam surrenders,” The History Channel website, 2013, http://www.history.com/this-day-in-history/south-vietnam-surrenders [accessed May 20, 2013].
“South Vietnam surrenders,” The History Channel website, http://www.history.com/this-day-in-history/south-vietnam-surrenders (accessed May 20, 2013).
South Vietnam surrenders [Internet]. The History Channel website; 2013 [cited 2013 May 20] Available from: http://www.history.com/this-day-in-history/south-vietnam-surrenders.
South Vietnam surrenders, http://www.history.com/this-day-in-history/south-vietnam-surrenders (last visited May 20, 2013).
South Vietnam surrenders. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/south-vietnam-surrenders. Accessed May 20, 2013.