Παραπομπή σε μορφή APA (7η εκδ.)

Trafton, P. R. (1989). New directions for elementary school mathematics. National Council of Teachers of Mathematics.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Trafton, Paul R. New Directions for Elementary School Mathematics. Reston, Va.: National Council of Teachers of Mathematics, 1989.

Παραπομπή σε μορφή MLA (8th εκδ.)

Trafton, Paul R. New Directions for Elementary School Mathematics. National Council of Teachers of Mathematics, 1989.