Dyfyniad APA

Ogden. Wil Lou Gray. University of South Carolina Press.

Dyfyniad Arddull Chicago

Ogden. Wil Lou Gray. University of South Carolina Press.

Dyfyniad MLA

Ogden. Wil Lou Gray. University of South Carolina Press.

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