Johnston-Wilder, S., & Mason, J. (2005). Developing thinking in geometry. Open University in association with Paul Chapman Pub.,.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJohnston-Wilder, Sue, और John Mason. Developing Thinking in Geometry. London ; Thousand Oaks, CA: Open University in association with Paul Chapman Pub.,, 2005.
एमएलए (8वां संस्करण) प्रशस्ति पत्रJohnston-Wilder, Sue, और John Mason. Developing Thinking in Geometry. Open University in association with Paul Chapman Pub.,, 2005.
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