APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (8. p.)

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