Husen, T., & Postlethwaite, T. N. The international encyclopaedia of education (Ed.2.).
Dyfyniad Arddull ChicagoHusen, Torsten, and T Neville Postlethwaite. The International Encyclopaedia of Education. Ed.2. New York, Elsevier Science.
Dyfyniad MLAHusen, Torsten, and T Neville Postlethwaite. The International Encyclopaedia of Education. Ed.2.
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