Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.