APA (7th ed.) Citation

Proudhon, P. (1995). What is Property? An Inquiry into the Principle of Right and of Government. Project Gutenberg.

Chicago Style (17th ed.) Citation

Proudhon, P.-J. What Is Property? An Inquiry into the Principle of Right and of Government. Project Gutenberg, 1995.

MLA (9th ed.) Citation

Proudhon, P.-J. What Is Property? An Inquiry into the Principle of Right and of Government. Project Gutenberg, 1995.

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