Dyfyniad APA

Pickett. Paul and Economics. Augsburg Fortress Publishers.

Dyfyniad Arddull Chicago

Pickett. Paul and Economics. Augsburg Fortress Publishers.

Dyfyniad MLA

Pickett. Paul and Economics. Augsburg Fortress Publishers.

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