179125 Sumner, R., & Warburton, F. W. (1972). Achievement in secondary school: Attitudes, personality and school success. London : National Foundation for Educational Research.
Chicago-čujuhus (17. p.)179125 Sumner, Raymond, juo Francis William Warburton. Achievement in Secondary School: Attitudes, Personality and School Success. London : National Foundation for Educational Research, 1972.
MLA-čujuhus (9. p.)179125 Sumner, Raymond, juo Francis William Warburton. Achievement in Secondary School: Attitudes, Personality and School Success. London : National Foundation for Educational Research, 1972.
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