APA (7th ed.) Citation

Russell, B. (2011). Our Knowledge of the External World as a Field for Scientific Method in Philosophy. Project Gutenberg.

Chicago Style (17th ed.) Citation

Russell, Bertrand. Our Knowledge of the External World as a Field for Scientific Method in Philosophy. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Russell, Bertrand. Our Knowledge of the External World as a Field for Scientific Method in Philosophy. Project Gutenberg, 2011.

Warning: These citations may not always be 100% accurate.