Παραπομπή σε μορφή APA (7η εκδ.)

Hopkins, C., Gifford, S., & Pepperell, S. (1999). Mathematics in the primary school: A sense of progression (2nd ed.). David Fulton.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hopkins, Christine, Sue Gifford, και Sandy Pepperell. Mathematics in the Primary School: A Sense of Progression. 2nd ed. London: David Fulton, 1999.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hopkins, Christine, et al. Mathematics in the Primary School: A Sense of Progression. 2nd ed. David Fulton, 1999.