Dyfyniad APA

McGhee, G. R. (2013). When the invasion of land failed: The legacy of the Devonian extinctions. Columbia University Press.

Dyfyniad Arddull Chicago

McGhee, George R. When the Invasion of Land Failed: The Legacy of the Devonian Extinctions. New York: Columbia University Press, 2013.

Dyfyniad MLA

McGhee, George R. When the Invasion of Land Failed: The Legacy of the Devonian Extinctions. Columbia University Press, 2013.

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