Gray, J. (1999). Improving schools: Performance and potential. Buckingham: Open University Press.
Dyfyniad Arddull ChicagoGray, John. Improving Schools: Performance and Potential. Buckingham: Open University Press, 1999.
Dyfyniad MLAGray, John. Improving Schools: Performance and Potential. Buckingham: Open University Press, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.