Maxwell, J. (1961). The level and trend of national intelligence: The contribution of the Scottish Mental Surveys. University of London Press.
Citace podle Chicago (17th ed.)Maxwell, James. The Level and Trend of National Intelligence: The Contribution of the Scottish Mental Surveys. London: University of London Press, 1961.
Citace podle MLA (8th ed.)Maxwell, James. The Level and Trend of National Intelligence: The Contribution of the Scottish Mental Surveys. University of London Press, 1961.
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