Porgy and Bess, the first great American opera, premieres on Broadway. (2013). The History Channel website. Retrieved 6:51, May 22, 2013, from http://www.history.com/this-day-in-history/porgy-and-bess-the-first-great-american-opera-premieres-on-broadway.
Porgy and Bess, the first great American opera, premieres on Broadway. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/porgy-and-bess-the-first-great-american-opera-premieres-on-broadway [Accessed 22 May 2013].
“Porgy and Bess, the first great American opera, premieres on Broadway.” 2013. The History Channel website. May 22 2013, 6:51 http://www.history.com/this-day-in-history/porgy-and-bess-the-first-great-american-opera-premieres-on-broadway.
“Porgy and Bess, the first great American opera, premieres on Broadway,” The History Channel website, 2013, http://www.history.com/this-day-in-history/porgy-and-bess-the-first-great-american-opera-premieres-on-broadway [accessed May 22, 2013].
“Porgy and Bess, the first great American opera, premieres on Broadway,” The History Channel website, http://www.history.com/this-day-in-history/porgy-and-bess-the-first-great-american-opera-premieres-on-broadway (accessed May 22, 2013).
Porgy and Bess, the first great American opera, premieres on Broadway [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/this-day-in-history/porgy-and-bess-the-first-great-american-opera-premieres-on-broadway.
Porgy and Bess, the first great American opera, premieres on Broadway, http://www.history.com/this-day-in-history/porgy-and-bess-the-first-great-american-opera-premieres-on-broadway (last visited May 22, 2013).
Porgy and Bess, the first great American opera, premieres on Broadway. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/porgy-and-bess-the-first-great-american-opera-premieres-on-broadway. Accessed May 22, 2013.