Pius X, P. (1910). The Mortu proprio of Pope Pius X: Dated June 29, 1910 [i.e. Sept. 1, 1910]. [Open Court?].
Dyfyniad Arddull ChicagoPius X, Pope. The Mortu Proprio of Pope Pius X: Dated June 29, 1910 [i.e. Sept. 1, 1910]. [Chicago?]: [Open Court?], 1910.
Dyfyniad MLAPius X, Pope. The Mortu Proprio of Pope Pius X: Dated June 29, 1910 [i.e. Sept. 1, 1910]. [Open Court?], 1910.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.