Davis, B. Spatial reasoning in the early years: Principles, assertions, and speculations (1a ed.).
芝加哥风格引文Davis, Brent. Spatial Reasoning in the Early Years: Principles, Assertions, and Speculations. 1a ed.
MLA引文Davis, Brent. Spatial Reasoning in the Early Years: Principles, Assertions, and Speculations. 1a ed.
警告：这些引文格式不一定是100％准确.