Hagen, J. W. (1986). Development during middle childhood: The years from 6 to 12, by W. A. Colins. Contemporary psychology, 31(12), 936-938.
Cita Chicago Style (17a ed.)Hagen, J. W. "Development During Middle Childhood: The Years from 6 to 12, by W. A. Colins." Contemporary Psychology 31, no. 12 (1986): 936-938.
Cita MLA (8a ed.)Hagen, J. W. "Development During Middle Childhood: The Years from 6 to 12, by W. A. Colins." Contemporary Psychology, vol. 31, no. 12, 1986, pp. 936-938.
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