↑Marcus T. Cicero, De officiis (Cantabrigiae Massachusettae: Harvard University Press, 1913).
Bibliographia
Fuligni, A. J., V. Tseng, et M. Lam. 1999. Attitudes toward Family Obligations among American Adolescents with Asian, Latin American, and European Backgrounds. Child Development 70:1030–1044. doi: 10.1111/1467-8624.00075.
Kopperi, Marjaana. 1999. Right actions and good persons: controversies between eudaimonistic and deontic moral theories. Aldershot Hants Angliae et Brookfield Montis Viridis: Ashgate. ISBN 1-84014-902-7.
Rodríguez, Leonardo. 1992. Deber y valor: investigaciones éticas. Matriti: Tecnos: Universidad Pontificia de Salamanca. ISBN 84-309-2262-8.