Barker, P. (1994). The eye in the door. Penguin.
Cita Chicago (17th ed.)Barker, Pat. The Eye in the Door. Harmondsworth: Penguin, 1994.
Cita MLA (8th ed.)Barker, Pat. The Eye in the Door. Penguin, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.