Cita APA (7th ed.)
Moore, G. E. (1959). Principia ethica (1 ed.). Cambridge University Press.
Cita Chicago (17th ed.)
Moore, George Edward. Principia Ethica. 1 ed. Cambridge: Cambridge University Press, 1959.
Cita MLA (9th ed.)
Moore, George Edward. Principia Ethica. 1 ed. Cambridge University Press, 1959.
Atenció: Aquestes cites poden no estar 100% correctes.