Gray. A Free Introduction to Moral Philosophy: The Moral Realist Point of View. Cambridge / Routledge / Oxford.
Citazione stile Chigago Style (17a edizione)Gray. A Free Introduction to Moral Philosophy: The Moral Realist Point of View. London / New York: Cambridge / Routledge / Oxford.
Citatione MLA (9a ed.)Gray. A Free Introduction to Moral Philosophy: The Moral Realist Point of View. Cambridge / Routledge / Oxford.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.