APA (7e ed.) Bronvermelding

(1970). Nuffield Foundation. Mathematics Teaching Project: Checking Up. W&R Chambers.

Chicago (17e ed.) Bronvermelding

Nuffield Foundation. Mathematics Teaching Project: Checking Up. Edinburgh: W&R Chambers, 1970.

MLA (9e ed.) Bronvermelding

Nuffield Foundation. Mathematics Teaching Project: Checking Up. W&R Chambers, 1970.

Let op: Deze citaties zijn niet altijd 100% accuraat.