Hollingworth, L. S. (1920). The psychology of subnormal children. The Macmillan Company.
Cita Chicago Style (17a ed.)Hollingworth, Leta Stetter. The Psychology of Subnormal Children. New York: The Macmillan Company, 1920.
Cita MLA (9a ed.)Hollingworth, Leta Stetter. The Psychology of Subnormal Children. The Macmillan Company, 1920.
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