Cita APA (7a ed.)

Moore, G. E. (1980). Principia ethica (1st pbk. ed., repr.). University Press.

Cita Chicago Style (17a ed.)

Moore, G. E. Principia Ethica. 1st pbk. ed., repr. Cambridge: University Press, 1980.

Cita MLA (9a ed.)

Moore, G. E. Principia Ethica. 1st pbk. ed., repr. University Press, 1980.