APA (7th ed.) Citation

Hume, D. (1953). An enquiry concerning the principles of morals. Open Court Pub.

Chicago Style (17th ed.) Citation

Hume, David. An Enquiry Concerning the Principles of Morals. La Salle, Ill: Open Court Pub, 1953.

MLA (9th ed.) Citation

Hume, David. An Enquiry Concerning the Principles of Morals. Open Court Pub, 1953.