Cita APA (7a ed.)

Stebbing, L. S. (1939). Thinking to some purpose. Penguin.

Cita Chicago Style (17a ed.)

Stebbing, Lizzie Susan. Thinking to Some Purpose. Harmondsworth: Penguin, 1939.

Cita MLA (9a ed.)

Stebbing, Lizzie Susan. Thinking to Some Purpose. Penguin, 1939.