It's easy to cite LitCharts for use in academic papers and reports.
MLA
Wilson, Joshua. "Adventures of Huckleberry Finn." LitCharts. LitCharts LLC, 19 Sep 2013. Web. 14 Jun 2021.
Chicago
Wilson, Joshua. "Adventures of Huckleberry Finn." LitCharts LLC, September 19, 2013. Retrieved June 14, 2021. https://www.litcharts.com/lit/the-adventures-of-huckleberry-finn.