It's easy to cite LitCharts for use in academic papers and reports.
MLA
Baena, Victoria. "Treasure Island." LitCharts. LitCharts LLC, 6 Jan 2017. Web. 15 May 2021.
Chicago
Baena, Victoria. "Treasure Island." LitCharts LLC, January 6, 2017. Retrieved May 15, 2021. https://www.litcharts.com/lit/treasure-island.