Cita APA (7th ed.)

Spencer, C., Blades, M., & Morsley, K. (1989). The child in the physical environment: The development of spatial knowledge and cognition. Wiley.

Cita Chicago (17th ed.)

Spencer, Christopher, Mark Blades, i Kim Morsley. The Child in the Physical Environment: The Development of Spatial Knowledge and Cognition. Chichester: Wiley, 1989.

Cita MLA (9th ed.)

Spencer, Christopher, et al. The Child in the Physical Environment: The Development of Spatial Knowledge and Cognition. Wiley, 1989.