Cita APA (7a ed.)

O'Connell, T. E. (1990). Principles for a catholic morality (Rev. ed.). HarperCollins.

Cita Chicago Style (17a ed.)

O'Connell, Timothy E. Principles for a Catholic Morality. Rev. ed. New York: HarperCollins, 1990.

Cita MLA (9a ed.)

O'Connell, Timothy E. Principles for a Catholic Morality. Rev. ed. HarperCollins, 1990.