APA (7th ed.) Citation

Holbach, P. H. T., & Middleton, A. C. (2010). Letters to Eugenia; Or, A Preservative Against Religious Prejudices. Project Gutenberg.

Chicago Style (17th ed.) Citation

Holbach, Paul Henri Thiry, and Anthony C. Middleton. Letters to Eugenia; Or, A Preservative Against Religious Prejudices. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Holbach, Paul Henri Thiry, and Anthony C. Middleton. Letters to Eugenia; Or, A Preservative Against Religious Prejudices. Project Gutenberg, 2010.

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