Crisp, R. (2015). The cosmos of duty: Henry Sidgwick's Methods of ethics (First edition.). Oxford University Press. https://doi.org/10.1093/acprof:oso/9780198716358.001.0001
Chicago-Zitierstil (17. Ausg.)Crisp, Roger. The Cosmos of Duty: Henry Sidgwick's Methods of Ethics. First edition. Oxford: Oxford University Press, 2015. https://doi.org/10.1093/acprof:oso/9780198716358.001.0001.
MLA-Zitierstil (9. Ausg.)Crisp, Roger. The Cosmos of Duty: Henry Sidgwick's Methods of Ethics. First edition. Oxford University Press, 2015. https://doi.org/10.1093/acprof:oso/9780198716358.001.0001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.