Gray, J. (1999). Improving schools: Performance and potential. Buckingham: Open University Press.
Trích dẫn kiểu ChicagoGray, John. Improving Schools: Performance and Potential. Buckingham: Open University Press, 1999.
MLA citiranjeGray, John. Improving Schools: Performance and Potential. Buckingham: Open University Press, 1999.
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