Cita APA (7a ed.)

Nielsen, K. (1973). Ethics without god. Pemberton : Prometheus.

Cita Chicago Style (17a ed.)

Nielsen, Kai. Ethics Without God. London ; New York: Pemberton : Prometheus, 1973.

Cita MLA (9a ed.)

Nielsen, Kai. Ethics Without God. Pemberton : Prometheus, 1973.