Shaffer, P. (1979). Three plays: Five finger exercise, shrivings, equus. Penguin Books.
Citazione stile Chigago Style (17a edizione)Shaffer, Peter. Three Plays: Five Finger Exercise, Shrivings, Equus. Harmondsworth: Penguin Books, 1979.
Citatione MLA (8a ed.)Shaffer, Peter. Three Plays: Five Finger Exercise, Shrivings, Equus. Penguin Books, 1979.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.