U.S. bombing of Cambodia ceases. (2013). The History Channel website. Retrieved 12:32, June 19, 2013, from http://www.history.com/this-day-in-history/us-bombing-of-cambodia-ceases.
U.S. bombing of Cambodia ceases. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/us-bombing-of-cambodia-ceases [Accessed 19 Jun 2013].
“U.S. bombing of Cambodia ceases.” 2013. The History Channel website. Jun 19 2013, 12:32 http://www.history.com/this-day-in-history/us-bombing-of-cambodia-ceases.
“U.S. bombing of Cambodia ceases,” The History Channel website, 2013, http://www.history.com/this-day-in-history/us-bombing-of-cambodia-ceases [accessed Jun 19, 2013].
“U.S. bombing of Cambodia ceases,” The History Channel website, http://www.history.com/this-day-in-history/us-bombing-of-cambodia-ceases (accessed Jun 19, 2013).
U.S. bombing of Cambodia ceases [Internet]. The History Channel website; 2013 [cited 2013 Jun 19] Available from: http://www.history.com/this-day-in-history/us-bombing-of-cambodia-ceases.
U.S. bombing of Cambodia ceases, http://www.history.com/this-day-in-history/us-bombing-of-cambodia-ceases (last visited Jun 19, 2013).
U.S. bombing of Cambodia ceases. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/us-bombing-of-cambodia-ceases. Accessed Jun 19, 2013.