“Geometry in Three Dimensions.” Charming Proofs: A Journey into Elegant Mathematics, by Claudi Alsina and Roger B. Nelsen, 1st ed., vol. 42, Mathematical Association of America, 2010, pp. 191–208, www.jstor.org/stable/10.4169/j.ctt6wpwnz.15. Accessed 13 June 2021.
Alsina, C., & Nelsen, R. (2010). Geometry in Three Dimensions. In Charming Proofs: A Journey into Elegant Mathematics (pp. 191-208). Mathematical Association of America. Retrieved June 13, 2021, from http://www.jstor.org/stable/10.4169/j.ctt6wpwnz.15
Alsina, Claudi, and Roger B. Nelsen. "Geometry in Three Dimensions." In Charming Proofs: A Journey into Elegant Mathematics, 191-208. Mathematical Association of America, 2010. Accessed June 13, 2021. http://www.jstor.org/stable/10.4169/j.ctt6wpwnz.15.
Export a RIS file (For EndNote, ProCite, Reference Manager, Zotero, Mendeley…)
Export a Text file (For BibTex)
Note: Always review your references and make any necessary corrections before using. Pay attention to names, capitalization, and dates.