Callas walks out of performance. (2013). The History Channel website. Retrieved 3:39, May 22, 2013, from http://www.history.com/this-day-in-history/callas-walks-out-of-performance.
Callas walks out of performance. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/callas-walks-out-of-performance [Accessed 22 May 2013].
“Callas walks out of performance.” 2013. The History Channel website. May 22 2013, 3:39 http://www.history.com/this-day-in-history/callas-walks-out-of-performance.
“Callas walks out of performance,” The History Channel website, 2013, http://www.history.com/this-day-in-history/callas-walks-out-of-performance [accessed May 22, 2013].
“Callas walks out of performance,” The History Channel website, http://www.history.com/this-day-in-history/callas-walks-out-of-performance (accessed May 22, 2013).
Callas walks out of performance [Internet]. The History Channel website; 2013 [cited 2013 May 22] Available from: http://www.history.com/this-day-in-history/callas-walks-out-of-performance.
Callas walks out of performance, http://www.history.com/this-day-in-history/callas-walks-out-of-performance (last visited May 22, 2013).
Callas walks out of performance. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/callas-walks-out-of-performance. Accessed May 22, 2013.