एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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