Ostad, S. A. (1997). Developmental differences in addition strategies: A comparison of mathematically disabled and mathematically normal children. British journal of educational psychology, 67(3), 345-357. https://doi.org/10.1111/j.2044-8279.1997.tb01249.x
Chicago-Zitierstil (17. Ausg.)Ostad, Snorre A. "Developmental Differences in Addition Strategies: A Comparison of Mathematically Disabled and Mathematically Normal Children." British Journal of Educational Psychology 67, no. 3 (1997): 345-357. https://doi.org/10.1111/j.2044-8279.1997.tb01249.x.
MLA-Zitierstil (9. Ausg.)Ostad, Snorre A. "Developmental Differences in Addition Strategies: A Comparison of Mathematically Disabled and Mathematically Normal Children." British Journal of Educational Psychology, vol. 67, no. 3, 1997, pp. 345-357, https://doi.org/10.1111/j.2044-8279.1997.tb01249.x.