It's easy to cite LitCharts for use in academic papers and reports.
MLA
Fredericksen, Erik. "Grendel." LitCharts. LitCharts LLC, 16 Sep 2013. Web. 16 Jan 2022.
Chicago
Fredericksen, Erik. "Grendel." LitCharts LLC, September 16, 2013. Retrieved January 16, 2022. https://www.litcharts.com/lit/grendel.