Cita APA (7a ed.)

Benedicto XVI, P., & Schönborn, C. (1994). Introduction to the Catechism of the Catholic Church. Ignatius Press.

Cita Chicago Style (17a ed.)

Benedicto XVI, Papa, y Christoph Schönborn. Introduction to the Catechism of the Catholic Church. San Francisco: Ignatius Press, 1994.

Cita MLA (9a ed.)

Benedicto XVI, Papa, y Christoph Schönborn. Introduction to the Catechism of the Catholic Church. Ignatius Press, 1994.