Dyfyniad APA

University of Nebraska--Lincoln. Center for Great Plains Studies. (1991). Great Plains research. Center for Great Plains Studies, University of Nebraska.

Dyfyniad Arddull Chicago

University of Nebraska--Lincoln. Center for Great Plains Studies. Great Plains Research. Lincoln, NE: Center for Great Plains Studies, University of Nebraska, 1991.

Dyfyniad MLA

University of Nebraska--Lincoln. Center for Great Plains Studies. Great Plains Research. Center for Great Plains Studies, University of Nebraska, 1991.

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