Johnston-Wilder, S., & Mason, J. (2005). Developing thinking in geometry. Open University in association with Paul Chapman Pub.,.
Chicago-referens (17:e uppl.)Johnston-Wilder, Sue, och John Mason. Developing Thinking in Geometry. London ; Thousand Oaks, CA: Open University in association with Paul Chapman Pub.,, 2005.
MLA-referens (8:e uppl.)Johnston-Wilder, Sue, och John Mason. Developing Thinking in Geometry. Open University in association with Paul Chapman Pub.,, 2005.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.