Cita APA (7a ed.)

Hume, D. (1998). An enquiry concerning the principles of morals. Univ. Pr.

Cita Chicago Style (17a ed.)

Hume, David. An Enquiry Concerning the Principles of Morals. Oxford: Univ. Pr, 1998.

Cita MLA (9a ed.)

Hume, David. An Enquiry Concerning the Principles of Morals. Univ. Pr, 1998.