“B: Eye-Opening Explorations.” Beautiful Mathematics, by Martin Erickson, 1st ed., Mathematical Association of America, Washington, DC, 2011, pp. 151–164, www.jstor.org/stable/10.4169/j.ctt13x0n39.12. Accessed 1 June 2020.
Erickson, M. (2011). B: Eye-Opening Explorations. In Beautiful Mathematics (pp. 151-164). Washington, DC: Mathematical Association of America. Retrieved June 1, 2020, from www.jstor.org/stable/10.4169/j.ctt13x0n39.12
Erickson, Martin. "B: Eye-Opening Explorations." In Beautiful Mathematics, 151-64. Washington, DC: Mathematical Association of America, 2011. Accessed June 1, 2020. www.jstor.org/stable/10.4169/j.ctt13x0n39.12.
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