Cita APA (7a ed.)

Langford, P. (1987). Concept development in the primary school. Croom Helm.

Cita Chicago Style (17a ed.)

Langford, Peter. Concept Development in the Primary School. London ; New York: Croom Helm, 1987.

Cita MLA (8a ed.)

Langford, Peter. Concept Development in the Primary School. Croom Helm, 1987.