Παραπομπή σε μορφή APA (7η εκδ.)

Deboys, M., & Pitt, E. (1988). Lines of development in primary mathematics (3rd ed.). The Blackstaff Press with the asssistance of The Queen's University of Belfast Teachers' Centre.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Deboys, Mary, και Eunice Pitt. Lines of Development in Primary Mathematics. 3rd ed. Belfast: The Blackstaff Press with the asssistance of The Queen's University of Belfast Teachers' Centre, 1988.

Παραπομπή σε μορφή MLA (9th εκδ.)

Deboys, Mary, και Eunice Pitt. Lines of Development in Primary Mathematics. 3rd ed. The Blackstaff Press with the asssistance of The Queen's University of Belfast Teachers' Centre, 1988.