Cita APA (7th ed.)

Russell, B. R. (1993). Our knowledge of the external world: As a field for scientific method in philosophy. Routledge.

Cita Chicago (17th ed.)

Russell, Bertrand Russell. Our Knowledge of the External World: As a Field for Scientific Method in Philosophy. London: Routledge, 1993.

Cita MLA (9th ed.)

Russell, Bertrand Russell. Our Knowledge of the External World: As a Field for Scientific Method in Philosophy. Routledge, 1993.