APA (7th ed.) Citation

Russell, B. (2004). The Problems of Philosophy. Project Gutenberg.

Chicago Style (17th ed.) Citation

Russell, Bertrand. The Problems of Philosophy. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Russell, Bertrand. The Problems of Philosophy. Project Gutenberg, 2004.

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