APA (7th ed.) Zitazioa

Tranzillo. John Paul II on the Vulnerable. The Catholic University of America Press.

Chicago Style (17th ed.) Zitazioa

Tranzillo. John Paul II on the Vulnerable. The Catholic University of America Press.

MLA (9th ed.) Zitazioa

Tranzillo. John Paul II on the Vulnerable. The Catholic University of America Press.