(1998). A dictionary of ecology (2nd edition.). Oxford ; New York: Oxford University Press.
Dyfyniad Arddull ChicagoA Dictionary of Ecology. 2nd edition. Oxford ; New York: Oxford University Press, 1998.
Dyfyniad MLAA Dictionary of Ecology. 2nd edition. Oxford ; New York: Oxford University Press, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.