APA (7th ed.) Zitazioa
Norman, R. (1983). The moral philosophers: An introduction to ethics. Clarendon Press.
Chicago Style (17th ed.) Zitazioa
Norman, Richard. The Moral Philosophers: An Introduction to Ethics. Oxford: Clarendon Press, 1983.
MLA (9th ed.) Zitazioa
Norman, Richard. The Moral Philosophers: An Introduction to Ethics. Clarendon Press, 1983.
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