Dyfyniad APA

Uekotter. The Turning Points of Environmental History. University of Pittsburgh Press.

Dyfyniad Arddull Chicago

Uekotter. The Turning Points of Environmental History. University of Pittsburgh Press.

Dyfyniad MLA

Uekotter. The Turning Points of Environmental History. University of Pittsburgh Press.

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