APA (7th ed.) Citation

Holbach, P. H. T. (2005). The System of Nature, or, the Laws of the Moral and Physical World. Volume 2. Project Gutenberg.

Chicago Style (17th ed.) Citation

Holbach, Paul Henri Thiry. The System of Nature, or, the Laws of the Moral and Physical World. Volume 2. Project Gutenberg, 2005.

MLA (9th ed.) Citation

Holbach, Paul Henri Thiry. The System of Nature, or, the Laws of the Moral and Physical World. Volume 2. Project Gutenberg, 2005.

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