Cita APA (7a ed.)

Simpson, P. (1987). Goodness and nature: A defence of ethical naturalism. Martinus Nijhoff Publishers.

Cita Chicago Style (17a ed.)

Simpson, Peter. Goodness and Nature: A Defence of Ethical Naturalism. Dordrecht [etc.]: Martinus Nijhoff Publishers, 1987.

Cita MLA (9a ed.)

Simpson, Peter. Goodness and Nature: A Defence of Ethical Naturalism. Martinus Nijhoff Publishers, 1987.