Ryan, J. H. (1922). A catechism of Catholic education. Washington, D.C..
Dyfyniad Arddull ChicagoRyan, James H. A Catechism of Catholic Education. Washington, D.C., 1922.
Dyfyniad MLARyan, James H. A Catechism of Catholic Education. Washington, D.C., 1922.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.