Cita APA (7a ed.)
Husen, T., & Husen, T. International study of achievement in mathematics: A comparison of twelve contries.
Cita estilo Chicago (17a ed.)
Husen, Torsten, y Torsten Husen. International Study of Achievement in Mathematics: A Comparison of Twelve Contries.
Cita MLA (9a ed.)
Husen, Torsten, y Torsten Husen. International Study of Achievement in Mathematics: A Comparison of Twelve Contries.
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