Kirkpatrick, E. A. (1909). Genetic psychology; an introduction to an objective and genetic view of intelligence. Macmillan Co..
Chicago-referens (17:e uppl.)Kirkpatrick, Edwin A. Genetic Psychology; an Introduction to an Objective and Genetic View of Intelligence. New York: Macmillan Co., 1909.
MLA-referens (8:e uppl.)Kirkpatrick, Edwin A. Genetic Psychology; an Introduction to an Objective and Genetic View of Intelligence. Macmillan Co., 1909.
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