It's easy to cite LitCharts for use in academic papers and reports.
MLA
Celona, Tina. "Ethan Frome." LitCharts. LitCharts LLC, 22 Jul 2013. Web. 3 Jun 2020.
Chicago
Celona, Tina. "Ethan Frome." LitCharts LLC, July 22, 2013. Retrieved June 3, 2020. https://www.litcharts.com/lit/ethan-frome.