Cita APA (7th ed.)

Moore, G. E. (1903). Principia ethical. C.U. Pr..

Cita Chicago (17th ed.)

Moore, George Edward. Principia Ethical. Cambridge: C.U. Pr., 1903.

Cita MLA (9th ed.)

Moore, George Edward. Principia Ethical. C.U. Pr., 1903.