Shaffer, P. (1979). Three plays: Five finger exercise, shrivings, equus. Penguin Books.
Chicago-viite (17. p.)Shaffer, Peter. Three Plays: Five Finger Exercise, Shrivings, Equus. Harmondsworth: Penguin Books, 1979.
MLA-viite (8. p.)Shaffer, Peter. Three Plays: Five Finger Exercise, Shrivings, Equus. Penguin Books, 1979.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.