if you are using MLA format:
For a live performance of a play, a ballet, an opera, or a concert, begin with the title of the work performed. Then name the author or composer of the work (preceded by the word "By"), followed by as much information about the performance as is available: the director ("Dir."), choreographer ("Chor."), or conductor ("Cond."); the major performers ("Perf."); the theater, ballet, or opera company; the theater and its city; and the date of the performance.
Art. By Yasmina Reza. Dir. Matthew Warchus. Perf. Philip Franks, Leigh Lawson, and Simon Shephard. Whitehall Theatre, London. 3 Dec. 2001.
Cello Concerto No. 2. By Eric Tanguy. Cond. Seiji Ozawa. Perf. Mstislav Rostropovich. Boston Symphony Orch. Symphony Hall, Boston. 5 Apr. 2002.
The morning star always gets wonderful bright the minute before it has to go --doesn't it?