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APA Citation
Preckel, F., Schmidt, I., Stumpf, E., Motschenbacher, M., Vogl, K., Scherrer, V., & Schneider, W. (2019). high‐Ability Grouping: Benefits for Gifted Students' Achievement Development Without Costs in Academic Self‐Concept. Child development, 90(4), 1185–1201. http://access.bl.uk/ark:/81055/vdc_100087075076.0x00005d