Ross, Sheldon M. 2017. “Introductory Statistics.” In Introductory Statistics (Fourth Edition), edited by Sheldon M. Ross, Fourth Edition, 797–800. Oxford: Academic Press. https://doi.org/https://doi.org/10.1016/B978-0-12-804317-2.00031-X.
Venables, W. N., and B. D. Ripley. 2002. Modern Applied Statistics with s. Fourth. New York: Springer. https://www.stats.ox.ac.uk/pub/MASS4/.
Wikipedia. 2021. “List of Breaking Bad Episodes.” 2021. https://en.wikipedia.org/wiki/List_of_Breaking_Bad_episodes.