Παραπομπή APA

Great Britain her majesty's stationary office. (1972). Mathematics in primary schools. Her majesty's stationary office.

Παραπομπή Chicago Style

Great Britain her majesty's stationary office. Mathematics in Primary Schools. London: Her majesty's stationary office, 1972.

Παραπομπή MLA

Great Britain her majesty's stationary office. Mathematics in Primary Schools. Her majesty's stationary office, 1972.