“Index.” Beyond the Quadratic Formula, by Ron Irving, 1st ed., Mathematical Association of America, 2013, pp. 223–226, www.jstor.org/stable/10.4169/j.ctt5hh9sp.12. Accessed 4 Aug. 2021.
Irving, R. (2013). Index. In Beyond the Quadratic Formula (pp. 223-226). Mathematical Association of America. Retrieved August 4, 2021, from http://www.jstor.org/stable/10.4169/j.ctt5hh9sp.12
Irving, Ron. "Index." In Beyond the Quadratic Formula, 223-26. Mathematical Association of America, 2013. Accessed August 4, 2021. http://www.jstor.org/stable/10.4169/j.ctt5hh9sp.12.
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