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. 6 Jul 2020.
Chicago
Baena, Victoria. "Treasure Island." LitCharts LLC, January 6, 2017. Retrieved July 6, 2020. https://www.litcharts.com/lit/treasure-island.