Gaya APA

Davis, B., group, S, R, S. (2015). Spatial reasoning in the early years : principles, assertions, and speculations . Oxon: Routledge.

Gaya MLA

Davis, Brent., group, Spatial, Reasoning, Study. "Spatial reasoning in the early years : principles, assertions, and speculations". Oxon: Routledge, 2015. Text.