Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

Halford, Graeme S. Children's Understanding: The Development of Mental Models. Hillsdale, New Jersey [etc.]: Lawrence Erlbaum, 1993.

Cita MLA (9a ed.)

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