Education, I. G. f. t. P. o. M., Olivier, A., & Newstead, K. (1998). Proceedings of the Conference of the International Group for the Psychology of Mathematics Education (22nd, Stellenbosch, South Africa, July 12-17, 1998). Volume 2.
Παραπομπή σε μορφή Chicago (17η εκδ.)Education, International Group for the Psychology of Mathematics, Alwyn Olivier, και Karen Newstead. Proceedings of the Conference of the International Group for the Psychology of Mathematics Education (22nd, Stellenbosch, South Africa, July 12-17, 1998). Volume 2. 1998.
Παραπομπή σε μορφή MLA (9th εκδ.)Education, International Group for the Psychology of Mathematics, et al. Proceedings of the Conference of the International Group for the Psychology of Mathematics Education (22nd, Stellenbosch, South Africa, July 12-17, 1998). Volume 2. 1998.