Παραπομπή σε μορφή APA (7η εκδ.)

National Council of Teachers of Mathematics. (1963). Enrichment mathematics for high school. National Council of Teachers of Mathematics.

Παραπομπή σε μορφή Chicago (17η εκδ.)

National Council of Teachers of Mathematics. Enrichment Mathematics for High School. Washington: National Council of Teachers of Mathematics, 1963.

Παραπομπή σε μορφή MLA (9th εκδ.)

National Council of Teachers of Mathematics. Enrichment Mathematics for High School. National Council of Teachers of Mathematics, 1963.