Clarke, R. F. (1955). Humility: Thirty short meditations. Catholic Truth Society.
Dyfyniad Arddull ChicagoClarke, Richard F. Humility: Thirty Short Meditations. London: Catholic Truth Society, 1955.
Dyfyniad MLAClarke, Richard F. Humility: Thirty Short Meditations. Catholic Truth Society, 1955.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.