Stone, C. R. (1962). New practice readers; T4: Book D. New York: McGraw-Hill.
Dyfyniad Arddull ChicagoStone, Clarence R. New Practice Readers; T4: Book D. New York: McGraw-Hill, 1962.
Dyfyniad MLAStone, Clarence R. New Practice Readers; T4: Book D. New York: McGraw-Hill, 1962.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.