APA (7th ed.) Citation

Halford, G. S. (1993). Children's understanding: The development of mental models. L. Erlbaum Associates.

Chicago Style (17th ed.) Citation

Halford, Graeme S. Children's Understanding: The Development of Mental Models. Hillsdale, N.J.: L. Erlbaum Associates, 1993.

MLA (9th ed.) Citation

Halford, Graeme S. Children's Understanding: The Development of Mental Models. L. Erlbaum Associates, 1993.