Παραπομπή σε μορφή APA (7η εκδ.)

Headington, R. (1997). Supporting numeracy: A handbook for those who assist in early years settings. David Fulton.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Headington, Rita. Supporting Numeracy: A Handbook for Those Who Assist in Early Years Settings. London: David Fulton, 1997.

Παραπομπή σε μορφή MLA (9th εκδ.)

Headington, Rita. Supporting Numeracy: A Handbook for Those Who Assist in Early Years Settings. David Fulton, 1997.