APA (7th ed.) Citation

Hume, D. (2004). An enquiry concerning the principles of morals. Prometheus Books.

Chicago Style (17th ed.) Citation

Hume, David. An Enquiry Concerning the Principles of Morals. Amherst, N.Y: Prometheus Books, 2004.

MLA (9th ed.) Citation

Hume, David. An Enquiry Concerning the Principles of Morals. Prometheus Books, 2004.

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