Steinberg, R. (2005). McGraw-Hill’s TOEFL computer-based test. New York: McGraw-Hill.
Dyfyniad Arddull ChicagoSteinberg, Roberta. McGraw-Hill’s TOEFL Computer-based Test. New York: McGraw-Hill, 2005.
Dyfyniad MLASteinberg, Roberta. McGraw-Hill’s TOEFL Computer-based Test. New York: McGraw-Hill, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.