SpringerLink (Online service), Singer, F. M., F. Ellerton, N., & Cai, J. (2015). Mathematical Problem Posing: From Research to Effective Practice. Springer New York : Imprint: Springer.
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Florence Mihaela Singer, Nerida F. Ellerton, και Jinfa Cai. Mathematical Problem Posing: From Research to Effective Practice. New York, NY: Springer New York : Imprint: Springer, 2015.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Mathematical Problem Posing: From Research to Effective Practice. Springer New York : Imprint: Springer, 2015.
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