Dyfyniad APA

Cosens. The Columbia River Treaty Revisited. Oregon State University Press.

Dyfyniad Arddull Chicago

Cosens. The Columbia River Treaty Revisited. Oregon State University Press.

Dyfyniad MLA

Cosens. The Columbia River Treaty Revisited. Oregon State University Press.

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