Oklahoma! premieres on Broadway. (2013). The History Channel website. Retrieved 6:06, May 21, 2013, from http://www.history.com/this-day-in-history/oklahoma-premieres-on-broadway.
Oklahoma! premieres on Broadway. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/oklahoma-premieres-on-broadway [Accessed 21 May 2013].
“Oklahoma! premieres on Broadway.” 2013. The History Channel website. May 21 2013, 6:06 http://www.history.com/this-day-in-history/oklahoma-premieres-on-broadway.
“Oklahoma! premieres on Broadway,” The History Channel website, 2013, http://www.history.com/this-day-in-history/oklahoma-premieres-on-broadway [accessed May 21, 2013].
“Oklahoma! premieres on Broadway,” The History Channel website, http://www.history.com/this-day-in-history/oklahoma-premieres-on-broadway (accessed May 21, 2013).
Oklahoma! premieres on Broadway [Internet]. The History Channel website; 2013 [cited 2013 May 21] Available from: http://www.history.com/this-day-in-history/oklahoma-premieres-on-broadway.
Oklahoma! premieres on Broadway, http://www.history.com/this-day-in-history/oklahoma-premieres-on-broadway (last visited May 21, 2013).
Oklahoma! premieres on Broadway. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/oklahoma-premieres-on-broadway. Accessed May 21, 2013.