Dyfyniad APA

Birkelbach. A Cycle of the West. Bison Books, University of Nebraska Press.

Dyfyniad Arddull Chicago

Birkelbach. A Cycle of the West. Bison Books, University of Nebraska Press.

Dyfyniad MLA

Birkelbach. A Cycle of the West. Bison Books, University of Nebraska Press.

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