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Dyfyniad Arddull ChicagoHorne, Sidney V. Father John P. O'Dwyer, O.S.A -Founding Father. Washington, D.C., 1942.
Dyfyniad MLAHorne, Sidney V. Father John P. O'Dwyer, O.S.A -Founding Father. Washington, D.C., 1942.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.