Gaya APA

Ratzinger, J. (1989). Principles of catholic theology, building stones for a fundamental theology, transl.by Sr.Mary Frances McCarthy, S.N.D. : Theologische Prinzipienlehre. 1982. . San Francisco: Ignatius Press.

Gaya MLA

Ratzinger, Joseph. "Principles of catholic theology, building stones for a fundamental theology, transl.by Sr.Mary Frances McCarthy, S.N.D. : Theologische Prinzipienlehre. 1982. ". San Francisco: Ignatius Press, 1989. Buku.