“The Elements of GeoGebra.” Exploring Advanced Euclidean Geometry with GeoGebra, by Gerard A. Venema, 1st ed., Mathematical Association of America, 2013, pp. 13–22, www.jstor.org/stable/10.4169/j.ctt5hh9ht.5. Accessed 29 July 2021.
Venema, G. (2013). The Elements of GeoGebra. In Exploring Advanced Euclidean Geometry with GeoGebra (pp. 13-22). Mathematical Association of America. Retrieved July 29, 2021, from http://www.jstor.org/stable/10.4169/j.ctt5hh9ht.5
Venema, Gerard A. "The Elements of GeoGebra." In Exploring Advanced Euclidean Geometry with GeoGebra, 13-22. Mathematical Association of America, 2013. Accessed July 29, 2021. http://www.jstor.org/stable/10.4169/j.ctt5hh9ht.5.
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