Dyfyniad APA

(1928). Retreats International Records. University of Notre Dame Archives.

Dyfyniad Arddull Chicago

Retreats International Records. University of Notre Dame Archives, 1928.

Dyfyniad MLA

Retreats International Records. University of Notre Dame Archives, 1928.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.