Cita APA (7th ed.)

Stephen, L. (1907). The science of ethics (2d ed.). Smith, Elder and co..

Cita Chicago (17th ed.)

Stephen, Leslie. The Science of Ethics. 2d ed. London: Smith, Elder and co., 1907.

Cita MLA (8th ed.)

Stephen, Leslie. The Science of Ethics. 2d ed. Smith, Elder and co., 1907.