Hadfield, J., & Hadfield, C. (1999). Simple reading activities. Oxford: Oxford University Press.
Dyfyniad Arddull ChicagoHadfield, Jill, và Charles Hadfield. Simple Reading Activities. Oxford: Oxford University Press, 1999.
Dyfyniad MLAHadfield, Jill, và Charles Hadfield. Simple Reading Activities. Oxford: Oxford University Press, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.