Παραπομπή σε μορφή APA (7η εκδ.)

Spence, E. (1995). How are we to live?: Ethics in an age of self-interest. Prometheus Books.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Spence, Edward. How Are We to Live?: Ethics in an Age of Self-interest. New York: Prometheus Books, 1995.

Παραπομπή σε μορφή MLA (8th εκδ.)

Spence, Edward. How Are We to Live?: Ethics in an Age of Self-interest. Prometheus Books, 1995.