(1961). Webster's new secondary school dictionary. New York: American Book.
Dyfyniad Arddull ChicagoWebster's New Secondary School Dictionary. New York: American Book, 1961.
Dyfyniad MLAWebster's New Secondary School Dictionary. New York: American Book, 1961.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.