APA
[John Paul II], . (2003). Message of His Holiness Pope John Paul II for the celebration of the World day of peace, 1 January 2003. Vatican: .
Chicago
[John Paul II], . 2003. Message of His Holiness Pope John Paul II for the celebration of the World day of peace, 1 January 2003. Vatican: .
Harvard
[John Paul II], . (2003). Message of His Holiness Pope John Paul II for the celebration of the World day of peace, 1 January 2003. Vatican: .
MLA
[John Paul II], . Message of His Holiness Pope John Paul II for the celebration of the World day of peace, 1 January 2003. Vatican: . 2003.