Shaffer, P. (1979). Three plays: Five finger exercise, shrivings, equus. Penguin Books.
Cita Chicago (17th ed.)Shaffer, Peter. Three Plays: Five Finger Exercise, Shrivings, Equus. Harmondsworth: Penguin Books, 1979.
Cita MLA (8th ed.)Shaffer, Peter. Three Plays: Five Finger Exercise, Shrivings, Equus. Penguin Books, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.