Barber, V. (2013). Barber, Virgil H., SJ, Papers. DigitalGeorgetown.
Dyfyniad Arddull ChicagoBarber, Virgil. Barber, Virgil H., SJ, Papers. Washington, D.C.: DigitalGeorgetown, 2013.
Dyfyniad MLABarber, Virgil. Barber, Virgil H., SJ, Papers. DigitalGeorgetown, 2013.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.