Cita APA (7th ed.)

Benoît XVI, Pera, M., & Moore, M. F. (2014). Without roots: The West, relativism, Christianity, Islam. Twentieth Century Religious Thought.

Cita Chicago (17th ed.)

Benoît XVI, Marcello Pera, i Michael F. Moore. "Without Roots: The West, Relativism, Christianity, Islam." Twentieth Century Religious Thought 2014.

Cita MLA (8th ed.)

Benoît XVI, et al. "Without Roots: The West, Relativism, Christianity, Islam." Twentieth Century Religious Thought, 2014.