International Conference for the Psychology of Mathematics Education Thessalonike, Greece, International Group for the Psychology of Mathematics Education, Καλντριμίδου, Μ., Σακονίδης, Χ., & Τζεκάκη, Μ. (2009). Proceedings of the 33rd conference of the international group for the psychology of mathematics education: In search for theories in mathematics education. International Croup for the Psychology of Mathematics Education.
Παραπομπή σε μορφή Chicago (17η εκδ.)International Conference for the Psychology of Mathematics Education Thessalonike, Greece, International Group for the Psychology of Mathematics Education, Μαρία Καλντριμίδου, Χαράλαμπος Σακονίδης, και Μαριάννα Τζεκάκη. Proceedings of the 33rd Conference of the International Group for the Psychology of Mathematics Education: In Search for Theories in Mathematics Education. Θεσσαλονίκη: International Croup for the Psychology of Mathematics Education, 2009.
Παραπομπή σε μορφή MLA (9th εκδ.)International Conference for the Psychology of Mathematics Education Thessalonike, Greece, et al. Proceedings of the 33rd Conference of the International Group for the Psychology of Mathematics Education: In Search for Theories in Mathematics Education. International Croup for the Psychology of Mathematics Education, 2009.