APA (7th ed.) Citation

Grant, R. (2006). The Opinions of a Philosopher. Project Gutenberg.

Chicago Style (17th ed.) Citation

Grant, Robert. The Opinions of a Philosopher. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Grant, Robert. The Opinions of a Philosopher. Project Gutenberg, 2006.

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