Davis, B. Spatial reasoning in the early years: Principles, assertions, and speculations (1a ed.).
Čikaški stil citiranja (17. izdanje)Davis, Brent. Spatial Reasoning in the Early Years: Principles, Assertions, and Speculations. 1a ed.
MLA način citiranja (8. izdanje)Davis, Brent. Spatial Reasoning in the Early Years: Principles, Assertions, and Speculations. 1a ed.
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