Dyfyniad APA

(1887). Diocese of Helena Letter. University of Notre Dame Archives.

Dyfyniad Arddull Chicago

Diocese of Helena Letter. University of Notre Dame Archives, 1887.

Dyfyniad MLA

Diocese of Helena Letter. University of Notre Dame Archives, 1887.

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