Παραπομπή σε μορφή APA (7η εκδ.)

Freudenthal, H. (1978). Weeding and sowing: Preface to a science of mathematical education. D.Reidel Publishing Company.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Freudenthal, Hans. Weeding and Sowing: Preface to a Science of Mathematical Education. Dordrecht,Holland: D.Reidel Publishing Company, 1978.

Παραπομπή σε μορφή MLA (9th εκδ.)

Freudenthal, Hans. Weeding and Sowing: Preface to a Science of Mathematical Education. D.Reidel Publishing Company, 1978.