Cita APA (7th ed.)

RUSSELL, B. (1980). Our knowledge of the external world; as a field for scientific method in philosophy (2nd ed.). George Allem and Unwin.

Cita Chicago (17th ed.)

RUSSELL, Bertrand. Our Knowledge of the External World; as a Field for Scientific Method in Philosophy. 2nd ed. London: George Allem and Unwin, 1980.

Cita MLA (9th ed.)

RUSSELL, Bertrand. Our Knowledge of the External World; as a Field for Scientific Method in Philosophy. 2nd ed. George Allem and Unwin, 1980.