Gaya APA

Hellwig, M, K. (2002). Understanding Catholicism, 2nd ed. . New York/Mahwah: New York/Mahwah Paulist Press.

Gaya MLA

Hellwig, Monika, K.. "Understanding Catholicism, 2nd ed. ". New York/Mahwah: New York/Mahwah Paulist Press, 2002. Buku.