Barry, P. (2013). Barry, Philip Papers. DigitalGeorgetown.
Dyfyniad Arddull ChicagoBarry, Philip. Barry, Philip Papers. Washington, D.C.: DigitalGeorgetown, 2013.
Dyfyniad MLABarry, Philip. Barry, Philip Papers. DigitalGeorgetown, 2013.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.