PISA 2009 results: students on line. Volume VI, Digital technologies and performance. Paris: Organisation for Economic Co-operation and Development, 2011. 394 s.
(2011). PISA 2009 results: Students on line. Paris: Organisation for Economic Co-operation and Development.
Styl ChicagoPISA 2009 Results: Students On Line. Paris: Organisation for Economic Co-operation and Development, 2011.
Citace podle MLAPISA 2009 Results: Students On Line. Paris: Organisation for Economic Co-operation and Development, 2011.
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