Gray, J. (1999). Improving schools: Performance and potential. Open University Press.
Lua i Stíl Chicago (17ú heag.)Gray, John. Improving Schools: Performance and Potential. Buckingham, Philadelphia: Open University Press, 1999.
Lua MLA (9ú heag.)Gray, John. Improving Schools: Performance and Potential. Open University Press, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.