Massive dust storm sweeps South Dakota. (2013). The History Channel website. Retrieved 10:44, May 19, 2013, from http://www.history.com/this-day-in-history/massive-dust-storm-sweeps-south-dakota.
Massive dust storm sweeps South Dakota. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/massive-dust-storm-sweeps-south-dakota [Accessed 19 May 2013].
“Massive dust storm sweeps South Dakota.” 2013. The History Channel website. May 19 2013, 10:44 http://www.history.com/this-day-in-history/massive-dust-storm-sweeps-south-dakota.
“Massive dust storm sweeps South Dakota,” The History Channel website, 2013, http://www.history.com/this-day-in-history/massive-dust-storm-sweeps-south-dakota [accessed May 19, 2013].
“Massive dust storm sweeps South Dakota,” The History Channel website, http://www.history.com/this-day-in-history/massive-dust-storm-sweeps-south-dakota (accessed May 19, 2013).
Massive dust storm sweeps South Dakota [Internet]. The History Channel website; 2013 [cited 2013 May 19] Available from: http://www.history.com/this-day-in-history/massive-dust-storm-sweeps-south-dakota.
Massive dust storm sweeps South Dakota, http://www.history.com/this-day-in-history/massive-dust-storm-sweeps-south-dakota (last visited May 19, 2013).
Massive dust storm sweeps South Dakota. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/massive-dust-storm-sweeps-south-dakota. Accessed May 19, 2013.