Cita APA (7a ed.)

Phelps, E. S. (1975). Altruism, morality and economic theory. Russell Sage Foundation.

Cita Chicago Style (17a ed.)

Phelps, Edmund S. Altruism, Morality and Economic Theory. New York: Russell Sage Foundation, 1975.

Cita MLA (9a ed.)

Phelps, Edmund S. Altruism, Morality and Economic Theory. Russell Sage Foundation, 1975.