Citazione Stile APA (7a Edizione)

Davis, B. Spatial reasoning in the early years: Principles, assertions, and speculations (1a ed.).

Citazione stile Chigago Style (17a edizione)

Davis, Brent. Spatial Reasoning in the Early Years: Principles, Assertions, and Speculations. 1a ed.

Citatione MLA (8a ed.)

Davis, Brent. Spatial Reasoning in the Early Years: Principles, Assertions, and Speculations. 1a ed.