John Paul II, P. (2013). Letter of Pope John Paul II to the elderly (1999). Boletin Eclesiastico de Filipinas.
Lua i Stíl Chicago (17ú heag.)John Paul II, Pope. "Letter of Pope John Paul II to the Elderly (1999)." Boletin Eclesiastico De Filipinas 2013.
Lua MLA (9ú heag.)John Paul II, Pope. "Letter of Pope John Paul II to the Elderly (1999)." Boletin Eclesiastico De Filipinas, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.