APA استشهاد

Russell, B. (1969). Our Knowledge of the External World: As a Field for Scientific Method in Philosophy. George Allen & Unwin.

استشهاد بنمط شيكاغو

Russell, Bertrand. Our Knowledge of the External World: As a Field for Scientific Method in Philosophy. London: George Allen & Unwin, 1969.

MLA استشهاد

Russell, Bertrand. Our Knowledge of the External World: As a Field for Scientific Method in Philosophy. George Allen & Unwin, 1969.