Urbom, R. (1998). Oxford American wordpower dictionary. Oxford: Oxford University Press.
Dyfyniad Arddull ChicagoUrbom, Ruth. Oxford American Wordpower Dictionary. Oxford: Oxford University Press, 1998.
Dyfyniad MLAUrbom, Ruth. Oxford American Wordpower Dictionary. Oxford: Oxford University Press, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.