Developing thinking in geometry
Johnston-Wilder Sue, Mason JohnKniha
Citace v seznamu literatury:
JOHNSTON-WILDER, Sue a MASON, John (ed.). Developing thinking in geometry. London: The Open University in association with Paul Chapman Publishing, 2005. ISBN 1412911699. Dostupné také z: http://www.loc.gov/catdir/enhancements/fy0659/2005924502-d.html.