It's easy to cite LitCharts for use in academic papers and reports.
MLA
Marcuson, Tim. "Best Seller." LitCharts. LitCharts LLC, 20 Oct 2018. Web. 22 Sep 2020.
Chicago
Marcuson, Tim. "Best Seller." LitCharts LLC, October 20, 2018. Retrieved September 22, 2020. https://www.litcharts.com/lit/best-seller.