Samuels, G. B. (1999). Enduring roots: Encounters with trees, history, and the American landscape. Rutgers University Press.
Dyfyniad Arddull ChicagoSamuels, Gayle Brandow. Enduring Roots: Encounters with Trees, History, and the American Landscape. New Brunswick, N.J.: Rutgers University Press, 1999.
Dyfyniad MLASamuels, Gayle Brandow. Enduring Roots: Encounters with Trees, History, and the American Landscape. Rutgers University Press, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.