APA

Ratzinger J. C. [. a., . (1994). Introduction to the Catechism of the Catholic Church. San Francisco: Ignatius Press.

Chicago

Ratzinger Joseph Cardinal [et al.], . 1994. Introduction to the Catechism of the Catholic Church. San Francisco: Ignatius Press.

Harvard

Ratzinger J. C. [. a., . (1994). Introduction to the Catechism of the Catholic Church. San Francisco: Ignatius Press.

MLA

Ratzinger Joseph Cardinal [et al.], . Introduction to the Catechism of the Catholic Church. San Francisco: Ignatius Press. 1994.