Dyfyniad APA

Hultgren. Border Walls Gone Green. University of Minnesota Press.

Dyfyniad Arddull Chicago

Hultgren. Border Walls Gone Green. University of Minnesota Press.

Dyfyniad MLA

Hultgren. Border Walls Gone Green. University of Minnesota Press.

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