Cita APA (7a ed.)

Boyle, A., & Boyle, N. (2003). The challenge of God: Exploring morality (3rd ed.). Gill & Macmillan.

Cita Chicago Style (17a ed.)

Boyle, Anne, y Niall Boyle. The Challenge of God: Exploring Morality. 3rd ed. Dublin: Gill & Macmillan, 2003.

Cita MLA (9a ed.)

Boyle, Anne, y Niall Boyle. The Challenge of God: Exploring Morality. 3rd ed. Gill & Macmillan, 2003.