It's easy to cite LitCharts for use in academic papers and reports.
MLA
Fredericksen, Erik. "Grendel." LitCharts. LitCharts LLC, 16 Sep 2013. Web. 14 Jun 2021.
Chicago
Fredericksen, Erik. "Grendel." LitCharts LLC, September 16, 2013. Retrieved June 14, 2021. https://www.litcharts.com/lit/grendel.