Cita APA (7a ed.)

Barker, P. (1994). The eye in the door. Penguin.

Cita Chicago Style (17a ed.)

Barker, Pat. The Eye in the Door. Harmondsworth: Penguin, 1994.

Cita MLA (8a ed.)

Barker, Pat. The Eye in the Door. Penguin, 1994.