Cita APA (7th ed.)

Ritchie, D. G. (1894). Natural rights: A criticism of some political and ethical conceptions. Allen & Unwin.

Cita Chicago (17th ed.)

Ritchie, David George. Natural Rights: A Criticism of Some Political and Ethical Conceptions. London: Allen & Unwin, 1894.

Cita MLA (9th ed.)

Ritchie, David George. Natural Rights: A Criticism of Some Political and Ethical Conceptions. Allen & Unwin, 1894.