Heitel, C., & Damerow, P. (1989). Mathematics, education and society: Reports and papers presented in .. Division of Science, Technical and Environmental Education, Unesco.
Cita Chicago (17th ed.)Heitel, Christine, i Peter Damerow. Mathematics, Education and Society: Reports and Papers Presented in .. Paris: Division of Science, Technical and Environmental Education, Unesco, 1989.
Cita MLA (9th ed.)Heitel, Christine, i Peter Damerow. Mathematics, Education and Society: Reports and Papers Presented in .. Division of Science, Technical and Environmental Education, Unesco, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.