Dyfyniad APA

Catholic Truth Society of Oregon. Catholic contributions to human progress. Catholic Truth Society of Oregon.

Dyfyniad Arddull Chicago

Catholic Truth Society of Oregon. Catholic Contributions to Human Progress. Portland, Ore.: Catholic Truth Society of Oregon.

Dyfyniad MLA

Catholic Truth Society of Oregon. Catholic Contributions to Human Progress. Catholic Truth Society of Oregon.

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