APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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