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APA-viite

International Conference for the Psychology of Mathematics Education, Helsingin yliopisto. Lahden tutkimus- ja koulutuskeskus, Pehkonen, E., University of Helsinki, Lahti Research and Training Centre, PME, & Conference of the International Group for the Psychology of Mathematics Education. (1997). Proceedings of the 21st Conference of the International Group for the Psychology of Mathematics Education: Volume 2. University of Helsinki, Lahti Research and Training Centre.

Chicago-tyylinen lähdeviittaus

International Conference for the Psychology of Mathematics Education, Helsingin yliopisto. Lahden tutkimus- ja koulutuskeskus, Erkki Pehkonen, University of Helsinki, Lahti Research and Training Centre, PME, ja Conference of the International Group for the Psychology of Mathematics Education. Proceedings of the 21st Conference of the International Group for the Psychology of Mathematics Education: Volume 2. [Lahti]: University of Helsinki, Lahti Research and Training Centre, 1997.

MLA-viite

International Conference for the Psychology of Mathematics Education, et al. Proceedings of the 21st Conference of the International Group for the Psychology of Mathematics Education: Volume 2. University of Helsinki, Lahti Research and Training Centre, 1997.

Harvard-tyylinen lähdeviittaus

International Conference for the Psychology of Mathematics Education, Helsingin yliopisto. Lahden tutkimus- ja koulutuskeskus, Pehkonen, E., University of Helsinki, Lahti Research and Training Centre, PME & Conference of the International Group for the Psychology of Mathematics Education. 1997. Proceedings of the 21st Conference of the International Group for the Psychology of Mathematics Education: Volume 2. [Lahti]: University of Helsinki, Lahti Research and Training Centre.

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