Redemptorists. (1994). Perpetual Help director's bulletin. Redemptorists.
Dyfyniad Arddull ChicagoRedemptorists. Perpetual Help Director's Bulletin. Liguori, MO: Redemptorists, 1994.
Dyfyniad MLARedemptorists. Perpetual Help Director's Bulletin. Redemptorists, 1994.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.