It's easy to cite LitCharts for use in academic papers and reports.
MLA
Sobel, Ben. "The Grapes of Wrath." LitCharts. LitCharts LLC, 17 Sep 2013. Web. 3 Jul 2020.
Chicago
Sobel, Ben. "The Grapes of Wrath." LitCharts LLC, September 17, 2013. Retrieved July 3, 2020. https://www.litcharts.com/lit/the-grapes-of-wrath.