John Paul II, P. (2013). Letter of Pope John Paul II to the elderly (1999). Boletin Eclesiastico de Filipinas.
Cita Chicago Style (17a ed.)John Paul II, Pope. "Letter of Pope John Paul II to the Elderly (1999)." Boletin Eclesiastico De Filipinas 2013.
Cita MLA (9a ed.)John Paul II, Pope. "Letter of Pope John Paul II to the Elderly (1999)." Boletin Eclesiastico De Filipinas, 2013.
Precaución: Estas citas no son 100% exactas.