John Paul II, P. (2013). Letter of Pope John Paul II to the elderly (1999). Boletin Eclesiastico de Filipinas.
Cita Chicago (17th ed.)John Paul II, Pope. "Letter of Pope John Paul II to the Elderly (1999)." Boletin Eclesiastico De Filipinas 2013.
Cita MLA (9th ed.)John Paul II, Pope. "Letter of Pope John Paul II to the Elderly (1999)." Boletin Eclesiastico De Filipinas, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.