Cita APA (7a ed.)

Spaemann, R., & Armstrong, T. (1991). Basic moral concepts (1st pub., reprint.). Routledge.

Cita Chicago Style (17a ed.)

Spaemann, Robert, y T.J Armstrong. Basic Moral Concepts. 1st pub., reprint. London [etc.]: Routledge, 1991.

Cita MLA (9a ed.)

Spaemann, Robert, y T.J Armstrong. Basic Moral Concepts. 1st pub., reprint. Routledge, 1991.