Davis, B. Spatial reasoning in the early years: Principles, assertions, and speculations (1a ed.).
Lua i Stíl Chicago (17ú heag.)Davis, Brent. Spatial Reasoning in the Early Years: Principles, Assertions, and Speculations. 1a ed.
Lua MLA (8ú heag.)Davis, Brent. Spatial Reasoning in the Early Years: Principles, Assertions, and Speculations. 1a ed.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.