Dyfyniad APA

University of Texas. The University of Texas publication. University of Texas.

Dyfyniad Arddull Chicago

University of Texas. The University of Texas Publication. Austin, Tex.: University of Texas.

Dyfyniad MLA

University of Texas. The University of Texas Publication. University of Texas.

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